They all have: same limbs, risers. The diff in power/poundage is the rail length Phoenix/Ibex 175# Exocet/Vortex 200# Emax Enox 225#.

As you guessed w/ those 6 models the 2nd ones are thumbholes and they will only interchange w/ each other.

You can't put a pistol grip stock on a thumbhole model. I had an Emax, Exocet and a Vixen. The Exocet is my favorite. The Emax was too much of a brute, eats serving and it's near impossible to find an arrow after a shot.

They all have the same triggers but the thumbholes appear different due to ergonomics and angles. They seem to have a heavier pound pull.

I've read the Phoenix is the biggest seller in Canada and the Emax here.

I like the feeling of a Vixen w/ just peep ad pin for turkey hunting, it's like a whole different bow, lighter still and better balanced, YMMV

The VixenII is stocked 1" shorter than the plain Vixen. They have a lifetime warranty new or used which keeps the price of used ones up there.

Talk to Danny Miller, USA warranty rep, he sometimes has deals on trade ups/downs. [740] 483-2312. No matter where you buy an Excal in the USA, prob arises it ends up w/ Danny and he encourages guys to just send them straight to him. Great guy to boot.