Another variations (Tomahawk, Porter)? Answered
I'd like to add that besides cowboy cut when comes from the upper part and with bigger part of bone is also called tomahawk.
Also when T-Bone steak comes with more meat in it is also called Porter.
These differences can be tricky and might confuse to some.
I've heard that in Argentina its very popular a steak called "Churrasco", I would like to know how to ask for it or which other names it has.