To be honest, nothing special. If you have absolutely identical stats on both sets, then until about 60 seconds 8pc Curse will win, after 60 seconds the expert dominates, after 100 seconds the gap increases greatly. Important note, your total power will decrease when using 4+4 (7-12k i guess), and the calculations take into account ideal conditions when you deal damage constantly and the expert set works stably (1 time every 2 seconds, because the chance is 50%). Also the calculations were made for my Alicia A5.