1080p - 6800 is ~4% slower than the 3080 and 9% slower than the 6800 XT (Hardware unboxed 18 game average)
1440p - 6800 is ~7% slower than the 3080 and 9% slower than the 6800 XT (Hardware unboxed 18 game average)
4k - 6800 is ~10% slower than the 6800 XT and ~14% slower than the 3080. (Hardware unboxed 18 game average)
https://www.youtube.com/watch?v=-Y26liH-poM&t=609s
Initially I was disappointed not to get a 6800XT but the 6800 will do me at 1440p ultrawide, especially since I will be putting a water block on it which I can then over clock to pretty much XT speeds.