That's true. The official warranty J700H has exynos 7850, i can confirm. Gsmarena says that snapdragon 615 version has better gaming performance (no doubt), but official accidental warranty 3G exynos 7850 model is best. No refurbished or blacklisted garbage. Accidental warranty helps a lot!
If you are coming from P8 Lite, then don't get disappointed that it doesn't have gyroscope, compass, auto brightness, notification LED etc. I had J5 and J7 together and the ONLY real life difference between them is, that J7 and J5 performance is almost equal in day to day basic tasks, but in heavy tasks J7 is much better, J7 offers 16GB ROM, J7 camera has HDR mode, but J7 camera is very slightly better than J5, display size difference, same battery timings of both.
So in J7, you get more performance only in heavy tasks, more storage, 5.5 display. Rest its almost same as J5.
Now Oppo F1, Honor 5X, K4 Note (not good for gamers AFAIK, but never tested its gaming performance) are also available in same price.