OnePlus 3T is not very different from OnePlus 3 but their are some changes that I have noticed.
Specification: -
i) Processor - Snapdragon 821 Quadcore 2.35Ghz( 64 Bit) Adreno 530 GPU which is pretty awesome I could say.
ii) Ram and Storage- It comes with 6 GB RAM( DD4) and 64/128 GB Internal Storage. In this case I would say that OnePlus has done a very good job.
iii) Battery - 3400 mAh Battery( Dash Fast Charging)
iv) Camera - 16M Front Facing and 16M Back Camera.
v) Display - 5.5 inch 1080 P Amoled Screen
My Personal Views
Battery Life - Battery has shown an incredible thing in this OnePlus 3T as compared to OnePlus 3 as it last for one full day while 4G LTE is enabled. There is a huge improvement in terms of battery life andit charges very quickly.
Style And Design - In terms of hold, this phone has greater hand grip and feel. Built quality is also very good and weight of OnePlus 3T is same as that of OnePlus 3.
Other Features- Fingerprint scanner is one of the best and it works flawlessly.
Camera - Back Camera has a lot of improvement than the OnePlus 3 but I didn’t saw much difference in front facing camera. In terms of video, there is more stabilization. In outdoor condition, the picture quality is just Awesome and also get a Bokey effect which is not easy to get that. In indoor condition also it works really good.
Performance - Performance in this phone is pretty good. It does not lag while playing games but got heat up while extensive gaming. 6 GB of RAM did all the job very well and I have no issues regarding this.
In day to day usage the phone is perfect with no sort of lag and I am impressed with this phone.