basically there are 3 "distributions" of LiteStep currently. I say "distributions" because there are really 2 true distributions but you could call another a third.

omar's installer - by far the most commonly used and supported distribution running currently with support for LSD4P, OTS1 and OTS2.

ez2install - competition for omar's installer. was released before omar's OTS2 installer came out; however, it doesn't adhere strictly to the OTS2 specification so can cause many problems.

Core - not really a distribution as many think of it. as ilmcuts put it the other day, if omar's installer is a distribution this would be considered a bare kernel. from this bare kernel however, you can build your own distribution and standard allowing for a more personalized build. aka...roll your own.