Series X or Series S for 1080p

I've try some juicied Deli with full sextants + Alva + double beyond on series S yesterday, can't believe that it no FPS drops on local side (1080p/60fps). My build is Spellslinger posion Blade Fall/Blast.

But game sometimes still crashes as well, don't know is it memory leaking or not, cause it feel so smooth before crash.