I run IF on on Samsung S7. Post the global update, I have been facing severe performance issue. Rendering all the graphics on lowest setting, and switching anti aliasing, it’s still a very Laggy experience. The rear camera also lags and misses few frames when I move around. Landing becomes tough as the controls don’t respond on time and there is always a lag.
I have degraded from 5 to 3 and soon will be pushed to 2 as I have completely stopped flying.
I have re-i stalled IF tons of times now. I run the processor of full throttle. I close all the background app. Still the same
Make sure all other apps were closed. I had the S7 and never faced a problem with max settings. Also be sure to do device maintanace before you fly. This will put to sleep unopened apps, clear ram, and remove unnecessary storage.
The S7 does only come with the Exynos 8890. The phone that you mean is the S8, which comes with the Snapdragon 835 and the Exynos 8895.
And no, there is no big difference at all. In some benchmarks and tests, the Exynos-version is better.
And regarding to your issue, just try out all the things that were suggested above.