pista has true track geometry. steep seat tube angle, head tube angle and short rake to the fork. this makes it a fast sprinter, and has very agile (or twitchy depending on your point of view handling). It puts you in a relatively agressive riding position.

The mark v is the other extreme. It has geometry similar to that of a standard road bike, which makes it a little more street friendly. it does keep the short wheelbase of the pista though (longer wheelbase = stability, shorter wheelbase= more maneuverability.

The surly has geometry half between road and track, and as a bonus has fatties fit fine. (large tires fit generously. which can be fun.) My main complaint is its made with 4130 tubing which is pretty heavy.

the kilo has a really long wheelbase, but steep angles (only the pista is steeper). I think thats just kinda weird.

my recommendation would be the pista if you want true track geometry, or the surly or iro if you want something a little more street friendly.