Party rake, $.5/1 Vs $1/2

[omaha]

Am starting to get the hang of this O8 game, and may be thinking of moving up in the future.

Have just checked out my rake payment to party, which is $120 in 4100 hands at .5/1 limit O8, which works out to be $2.93 per 100hands

Checking out the party web site, it would appear, as a guess, that at the $1/2 limit, the pots would be double the size, but the rake would not double- I think it might only go up 25-40%

I would appreciate anyone who could post their $1/2 rake payments in comparison