I went from a zotac 3090 to a 3080ti fe just recently for 2 reasons. First reason was i wasnt that happy with the zotac, its one of poorest performing 3090s in benchmarks. Its power limit is locked and despite following several guides it just would not flash so i could properly overclock it. With the 3080ti fe overclocking was easy, i get about 1000 extra with it in timespy.
Second reason was financial. I sold the 3090 on ebay, i bought it at xmas for msrp (this was when prices werent inflated) and got my money back even though its 8 months old. So now i have a new card, i have a little extra gpu performance and saved about £500. Slight downer is the ti has slight coil whine under heavy load. Its not bad, i did think about returning it but its hardly audible above the fans, if i returned it now i'd have no gpu. The 3090 had no coil whine.