Not a logo, but this would remedy the lack of matching fonts on the tumblr, which for whatever reason bugs me.
(to each his own. The fon't certainly don't match imo, the background font is caps helvetica or arial, the one used in the circle graphic certainly is neither.)
the STs are similar in the thigh I would say a size smaller PS, but has a bit larger rise (thankfully), the taper from knee to leg opening is not as drastic as the PS I would say, but its not massively different. All in all, the ST is a better cut imo, the rise on the PS is just brutal for a tall dude like me.