According to my calculations rake is twice as high on 888 than on PS for PLO2 comparing official comissions. Than the gap gradually decreases towards PLO25, but still 50% more for PLO5.
Although targets are softer on 888, it has traffic problems, and the software is worse, and much worse for multi-tabling.
Anyways I used accustomed to having paid same amount in rake that I won (rake adjusted) on 888 (i.e 4 won 4 paid in rake). Now first day on PS testing with just 2-3 buyins on PLO2 zoom (waiting 3 days for 888 cashout to clear), I won $3 (rake adjusted) and paid only under 0.50 in rake. And the rakeback is better too (like 30% even at silver/gold star?)
I mean WOW! Give you perspective on how to increase winrate ennoumously just by choosing a better deal!