As of now, we can only suggest about OnePlus5 smartphone compared to LG V30 device as OnePlus 5 was already released and people are using it here around. The next thing is about its release in India, which is going to take place soon though it was already launched in other countries. The review of the phone will be available any time later, so, once it is handy then we can at least tell something about that.
However, OnePlus5 is a better option if we check the reviews online and use it offline too. The results are awesome from this device including speed, camera result, overall performance etc. However, it doesn't mean these are the only gadgets we have as an option for the better performances to speak (except this question), there are many smartphones already around which are still better compare to these devices.
When we compare between LG V30 vs OnePlus5 in real, then the real handy is better one compare to upcoming gadget which is about to release here soon with little higher specs, price compared to OnePlus5 device.