Dynafit AT Bindings....diff. titles...or diff. bindings??

Hi Anybody:D
Hey I'm looking for some Dynafits but I'm a little confused as to the titles I'm seeing...
I know the "Comfort" in TLT, but there are 3 titles of available bindings:
1) "Tourlite Tech TLT" (need a manual click-in...y/n)
2) "Lite Tech IV"
3) "Tourlite Tristep...F02"

Are each of these a distinctly different binding? (This was how they were labeled in ads). I was looking for the "Comfort TLT" , but will settle for the closest and/or most *bomber*;)

Any help will be appreciated...