You'd be surprised, some people (myself included) really like track geometry on the street. If you're a caffeinated commuter like myself (only on non-recovery days now!) you may find you appreciate the steeper seat tube, shorter chainstays and twitchier steering on the street. But some people commute in the same style as they'd ride a 60 mile road ride, whereas I go pretty much like I'm in a personal TT anytime I'm in the city (of course, except on recovery days) and save the long rides for the slacker geo. cross bike w/ slicks.
The Pista has nice geometry but you may find it flexy after you put in some training and get stronger legs. It's pretty much the same thing as all the other mass-marketed Taiwanese TIG'd steel frames, aside from a few small intricacies. The T1 would be a better racing canidate long term.
I've commuted on both steel and aluminum track bikes... you get used to either one of them, though the aluminum feels nicer for really hammering on and tracking straight while the steel feels nicer on really bumpy/crappy streets. But material and geometry isn't everything. You can offset some of the harshness that comes inherent in any given geometry or tubing selection by opting for lower-profile rims (Open Pros, Aeroheads et al.), nicer tires (anything with a kevlar bead should do the trick as they dampen vibrations nicely) and whatever you find works best for bartape and saddle.
And honestly, since you're a little heavier you're going to find it easier to flex your components. If you're taller too (6 feet or above), I'd say no question go for the T1. Better yet, ride them both and decide from there.