Since you are Interested in comparing both the devices, it would be better if I make comparative analysis rather than describing both the phones in detail.
This is what Yu Yureka has to offer -
1.The front of the phone is smooth without any kind of markings or emblems.
2. Specification-wise, it has Snapdragon 615 Octacore 64 Bit processor to run your device super-smooth, a Adreno 405 GPU and a 2 GB RAM so that the phone will not lag.
3. The internal memory is 16 GB, while it can be expanded up to 32 GB via microSD card.
4. The device sports a 5.5 inch 720 x 1280 resolution screen.
5. Yu runs on Cyanogen 11. The OS is good and customizable in a number of ways.
6. There is a minimum amount of bloatware, which is a good gesture- there is a browser named Yuniverse (Opera with custom icon and skin), common Google apps, a calculator and an audio equalizer come preloaded on the device.
7. 13 MP Rear camera on the phone is quite impressive, but struggles in low light. 5 MP front camera is available for self ie moments and video chats.
8. Battery capacity of Yu is 2500 mAh.
9. It is available in single color option in Moonstone Grey.
Price of Micromax Yu Yureka is around Rs.9000.
One Plus One is the new phone by Chinese entrant One Plus. It has a few great features in addition to being cost effective.
Some of the features include-
1. Rear camera is of 13 MP equipped by Sony Exmor. The camera employs 6 lens optics for avoiding distortion. A 5 MP distortion free front camera is provided for those selfie moments. 4K resolution video recording and slow motion mode are available to enhance video quality.
2. The device is powered by Snapdragon 801 quadcore processor clocking 2.5 GHz and Adreno 330 GPU which renders flawless graphics. 3 GB DDR3 RAM on board ensures lag free functioning. The phone is available in 16 and 64 GB variants.
3. Screen size of the device Is 5.5 inches
4. Battery capacity is 3100 mAh.
5. Color availability - Silk White and Sandstone.
The best features of the phone include-
1. Blazing fast performance.
2. Good quality screen.
3. Flexibility of Cyanogen OS.
However, the device also suffers some disadvantages:
1. Camera, though claims to be the best one around, is average.
2. Battery life is reported to be disappointing.
3. Availability of the phone is restricted as it will only be available online by a single partner.
Though Yu scores over One Plus One in terms of processor which is 44% faster and external SD card slot ( which One plus One lacks), One plus One has an edge over Yu because of its battery, 4K video shooting and higher RAM. However, in view of the continued Cyanogen updates ( which will not be available for One Plus One) and doorstep service promised by Micromax, Yu should be a better option for Indian users at half the price of One.
Live....and Let Live!