PT Stat Difference MH vs SH

[Yodaman]

Currently, I'm a decent winner MH doing something like 2ish BB/HR at 3/6, and playing Live 8/16.

I understand the variance is much larger SH than MH, but for some reason I don't do well at the SH games, (perhaps my variance starts on a big downswing?) or I just suck.

MH I get around 15-20 VPIP/7-12ish PFR, SH goes around 20-25 VPIP/15-17ish PFR.

What is considered fishy? nitty? LAGgy? And perhaps some tips to adjust play on SH that MH player might do.