It's clear you're playing $10NL more scared than $5NL - look at the VP and more importantly the steal stats. Now, I don't know if you were too reckless at $5, but the BB/100 doesn't seem to indicate so. At $10 the players aren't noticeably better, but they might be slightly more willing to let you steal their blinds, and to try and steal yours. So why are your stats so much weaker?

The SB VP stats are interesting too. Have you made money on the SB in $5NL? Because if so then again, you are being too tight here.

Are you playing fewer suited connectors/gappers etc? There must be something in that 3% difference. My VP is about 19% and I play SCs whenever they're feasible and more besides with position. Have you taken these out of your armoury?