I went from the T-1 to the T-2 for one reason: To able to use a magnifier. The T-1, in conjunction with both the Aimpoint and Eotech G33 magnifiers, had a "dot" that looked like a sausage and covered about 5 MOA. Zero'ing was a mess. And this was the same for six other guys and myself who tried these combos. The adjustments on the G33 helped a bit but still not satisfactory. The T-2 fixed that. Clear, round dot with either magnifier.
Are the the optics of the T-2 "clearer and crisper"? A bit, I suppose. But any difference is academic and IMHO the practical effect on target identification and hit probability is zero, zip, nada.
The flip up covers might be nice for some. Not of much practical use here in the desert southwest but, might be useful for the guys in harsher climes.
In short, unless you're planning on using a magnifier I'd go with the T-1 and use the surplus $ on ammo.