well that is subjectively opinion, i would rather play on 1440p on high then 1080 ultra, usually higher resolutions bring better view experience, same as on 720 vs 1080 when on high or above cause that little extra details that you get from ultra is only there so it looks little better like lightning shadows and stuff. so to me games always looks better with more pixels then with more effects. if it was 1080 ultra vs 1440 medium i would pick 1080 (cause of huge difference in detail/effects amount from medium vs ultra then high vs ultra)