Is it just me or are the $11s on stars MUCH harder than the $5.50s?

[KSOT]

I've been beating the $5.50s pretty badly and consistently for weeks now and thought it was time for me to advance. Well I just played 6 $11 1-tables in a row and have yet to break 5th place. Seems like the people are a hell of a lot better. More than I had expected from such a small jump in price. Is it true or am I just experiencing the ass end of variance?