From Party Sng $30 to $50

[act]

I play 30+3 Sng at Party. Multitabling four at a time and average return of about 22% after app 450 tournaments ($7.25 pr tournament).

Recently I have tried my luck at the 50+5 but I don't have great success. I have played about 70 tournaments, and I average only about 9% (app 5 USD pr tournament).

My question is: is the $50 tournaments that much harder than the $30 or is it more likely that i have been a litle bit unlucky?

I know my sample size is very small for the $50 tournaments.