Difference between HTC One M8 and HTC One M9 ?

You are right to say Himan, HTC One M8 and HTC One M9 have many similar features. But I will make you aware regarding the difference among them and I will also let you know the best among them.

Differences between HTC One M8 and HTC One M9

Height, Width and Thickness
Both the devices varies in Height, Width and Thickness:

• HTC One M9: Its height is 144.6 mm, width is 69.7 mm and the thickness is 9.6 mm.
• HTC One M8: Its height is 146.4 mm, width is 70.6 mm and the thickness is 9.4 mm.

Weight
The HTC One M8 is found to be around 160 grams in weight whereas the HTC One M9 is found to be around 157 grams.

Processor and GPU
HTC One M9 has a GPU of Adreno 430 and the processor of Qualcomm MSM8994 Snapdragon 810 (64-bit)
Quad-core 1.5 GHz Cortex-A53 & Quad-core 2 GHz Cortex-A57 whereas the HTC One M8 has the GPU of Adreno 330 and the processor of Qualcomm MSM8974AB Snapdragon 801 (32-bit) Quad-core 2.3 GHz (US/EMEA)/ 2.5 GHz (Asia, China) Krait 400.

Primary camera
HTC One M9 has a primary camera of 20.7 MP, 5376 x 3752 pixels with Auto-focus, dual-LED (dual tone) flash, automatic simultaneous video and image recording, Geo-tagging, face/smile detection, HDR and panorama features whereas the HTC One M8 has a primary camera of Dual 4 MP, 2688?1520 pixels with Auto-focus, dual-LED (dual tone) flash, 1/3" sensor size, 2µm pixel size, automatic simultaneous video and image recording, geo-tagging, face/smile detection, HDR and panorama feature.

One thing to note here is that HTC One M8 features 4 Ultra-pixel primary camera, so it will be able to click good pictures in even low light conditions. But as HTC One M9 features a 20.7 MP primary camera, so it will be somewhat (but not much) better than its predecessor.

Video recording
HTC One M9 gives you a video at 2160p@30fps, 1080p@60fps, 720p@120fps, HDR and stereo sound rec whereas the HTC One M8 gives you the video output at 1080p@60fps, 720p@120fps, HDR and stereo sound rec.

Front camera
HTC One M9 offers you a front camera of 4 MP, 1080p@30fps and HDR whereas HTC One M8 offers a front camera of 5 MP, 1080p@30fps and HDRs.

Battery capacity
HTC One M9 can give you a Stand-by up yo 402 hours and a 3G talk up to 21:50 hours whereas HTC One M8 can give a Stand-by up to 496 hours an 3G talk up to 20 hours.

These were some of the differences among HTC One M8 and HTC One M9. Its very difficult to select the best among them but as per my opinion you must go for HTC One M8. I have provided some of its features, specification, pros and cons below so as you can be aware regarding them and they can be useful to you. Go through the details given below to know more about HTC One M8.

HTC One M8

It was announce and released recently in the month of March, 2014. It is built with the dimensions of 146.4 x 70.6 x 9.4 mm. It is found to be around 160 gram in weight. It supports Nano-SIM. It offers you a Super LCD3 capacitive touchscreen with 16M colors of 5.0 inches which supports the resolution of 1080 x 1920 pixels. It has 441 PPI which is considered to be much good. It is a multitouch device which comes protected with Corning Gorilla Glass 3. It operates on Android OS, v4.4.2 (KitKat) which can be upgraded later on to v5.0 (Lollipop) so as to enjoy more and more Android games. It runs on Qualcomm MSM8974AB Snapdragon 801, Quad-core 2.3 GHz (US/EMEA)/ 2.5 GHz (Asia, China) Krait 400 processor with 2 GB of RAM. It comes loaded with the internal storage space of 16/32 GB and the external storage space can be expanded using microSD card up to 128 GB. It offers a primary camera of Dual 4 MP, 2688?1520 pixels with Auto-focus, dual-LED (dual tone) flash and check quality features. It supports some more camera related features such as 1/3'' sensor size, 2µm pixel size, automatic simultaneous video and image recording, Geo-tagging, face/smile detection, HDR and panorama. It also offers a front camera of 5 MP, 1080p@30fps and HDR. It supports 3.55 mm audio jcak and comes loaded with a loudspeaker. It supports Wi-Fi 802.11 a/b/g/n/ac with dual-band, Wi-Fi Direct, DLNA and hotspot features. It supports Bluetooth v4.0, NFC, Infrared port, FM and microUSB v2.0 as some of its connectivity features. It comes loaded with few sensors such as Accelerometer, gyro, proximity, compass and barometer. it supports some messaging related features such as SMS (threaded view), MMS, Email and Push Email. It supports Java. it is powered by Non-removable Li-Po 2600 mAh battery which promises you to give a stand-by Up to 271 h (2G) / Up to 496 h (3G) and Talk time Up to 14 h (2G) / Up to 20 h (3G). It is available in Gunmetal Gray, Glacial Silver and Amber Gold colors.

Pros

• Great design
• Great performance
• Great battery capacity
• Great display
• Motion Launch functionality

Cons

• Mediocre camera
• Not waterproof

These were some of the features, specifications, pros and cons of the HTC One M8.

Key differences between HTC One M8 and M9

After much hide and seek and a lot of leaks, HTC has finally announced the next flagship HTC One M9.The device is definitely an upgrade on its predecessor. Let's examine the differences based on a few key points.

Design and Build

The M8 has an all metal Aluminium unibody.  It measures 146.4x70.6x9.4 mm and weighs 160 grams. The device has an ergonomic design. The M9 has the dimensions of 144.6x69.7x9.61 mm and weighs 157 grams. The M9 - thus is lighter , narrower and a bit thicker.  

The device has also got a little change in the looks and placement of buttons. M9 now features dual tone all metal unibody design. What I mean by dual tone is that the rear of the device is silver while the edges are gold coated. The volume rockers and microSD Card slot on the right on M8 have undergone a slight change - now power button and volume rockers are on right. Power button used to be on top on M8.

Though M9 looks much similar to M8, there is a scratch resistant coating and sapphire glass lens on rear camera.

Display

M9 shares the same 5th display on M8. Even the resolution and pixel density stay similar at 1920x1080 full HD. and 441 ppi. HTC has not made any kind of improvement in this department.

Hardware

M8 was powered by Snapdragon 801 quad core processor with a clock speed at 2.1 GHz. HTC has improved on it by incorporating Snapdragon 810  octacore processor clocking at an astonishing 2.7 GHz.  The M8 has 2 GB RAM while M9 is equipped with 3 GB RAM - a hike of almost 50%. Besides the M8 has DDR3 RAM , while M9 employs DDR4 RAM which is 80% faster. A change has been made to the Graphics unit as well. M8 has Adreno 330 GPU while M9 employs Adreno 430 GPU. It ensures a completely better graphics rendering on M9 than on M8.

Storage

M8 is available with 16 GB internal memory with an expandable option upto 128 GB. M9 has it a little enhanced to 32 GB expandable upto 128 GB. So must say, an improvement here.

Camera

M8 had brought the first ever instance of Ultra pixel technology. It has 4 Ultra pixelr rear camera and wide angle lens. It meant better low light performance. But video quality is too poor. M9 has ditched the Duo Camera setup this time and has a 20 MP rear camera with the same dual LED flash as on M8 .It can record 4K videos. It utilises what HTC calls Dynamic Exposure Algorithm which mimics human eye. A new software called One Gallery has been introduced wherein all your images- either from One Drive, Google Drive  or Facebook - are at one place. Hardware and software improvements suggest that M9 camera will be much better than M8's.

Ultra pixel technology- though  left off on rear camera- has been retained for the front camera.

Software

M8 runs on Android 4.4.2 Kit kat. The Sensei 6 skin provides a lot of customisation options. M9 , however comes with Android Lollipop 5.0.2 with Sensei 7 skin. The Sensei 7 skin has a new app called Themes app which lets you create new themes using your gallery.

Battery

The battery capacity has been  improved. M8 carries a 2600mAh battery while it has been upped to 2840 mAh on M9. The M9 has talk time of 25.4 hours on 2G and 21.7 hrs on 3G. M8  offers 20 hours talk time on 3G .

What I would think?

The M9 is definitely an upgrade over M8 . HTC has taken care to improve on the performance of M8. If speed is your requirement, you must  upgrade to M9. HTC should have come up with a better resolution screen. A mere full HD is a bit outdated in present scenario. But since you are interested in the changes in M9 over M8 , I hope Iy have provided a complete list of the key differences.
In case you are interested in buying this awesome device , here are a few key specs-

Specifications of HTC One M9

The HTC M9 – successor to M8 – has been announced at MWC in Barcelona. The specifications include –

General Characteristics

• The physical dimensions of the device are 144.6 x 69.7 x 9.61 mm.
• It weighs 157 gms.

Display

• The device sports a 5.0 inches LCD screen at 1920 x 1080 resolution.
• Pixel density is 441 ppi.

Hardware

• The phone is powered by 1.5 GHz Octacore Snapdragon 810 processor.
• 3 GB onboard RAM is best suited for the heavy multitasking.
• Internal memory of the device is 32 GB that can be expanded upto 128 GB via microSD card.

Camera

• The phone carries a 20 MP rear camera.
• It also has a 4 Ultrapixel front camera for selfie moments.

Software

• The HTC M9 runs on Android 5.0 Lollipop, with HTC's Sensi 7.0 UI.
• It features HTC Themes to help you customize the Sensei UI to your liking.

Connectivity

• It supports a nano SIM.
• Other connectivity features include WiFi, GPS, Bluetooth 4.1, NFC, DLNA, infrared, HDMI, FM and microUSB.
• Sensors on the device include compass, proximity sensor, accelerometer, ambient light sensor and gyroscope.

Battery

• The device carries a 2840 mAh non removable battery.
• The manufacturer says the device has a rated 21.7 hours talktime on 3G network.