I am in .fresh so can´t play RIO, GG, ACR or any of these

Just 2 rooms, Pokerstars and Winamax
Here rake of both

Stars is the first image, winamax second one.
The difference is that in winamax the tables are 5 max and I can get a rakeback of about 15% in NL10 and rake in 5,75%, while in pokerstars the tables are 6max and the rakeback is almost 0%, rake 6% with less cap. Right now I am playing NL5 on pokerstars, but I have doubts if it should change, it is difficult for me to understand which is cheaper.

thanks