the MT will give you more of an advantage that the TSL tires have, three stage lug, you have the nice side lugs, and good spacing on the inside ones. They look almost identical to the IROK'S. But as many have said, tires shouldnt be bought based on the tread aesthics. but on their performance, and between the two tires in question the MT's will make you happier.
as far as pricing
also the M/T is a radial, so you may get more miles out of them than the STS. But whatever you do, dont get the THORNBIRDS, those things are horrible.