I do use some of the same techniques in wreck diving that I do in cave diving. However, I feel they are two differant animals when you compare the cave and wreck side by side.

It can be agreed upon by many (I hope) that buoyancy, fin control, kick technique are pretty universal when in cave or wreck. I think a big differance is equipment.

I am not going to carry a crowbar or hammer into a cave. However, I would consider them in a wreck not just due to artifacts but for safety. I think a crowbar and hammer could be a good...oh crap tool in the right situation.

When laying line in a cave you do have to be careful where you lay in ref. to sharp rocks, line traps and so on. In a wreck you have sharp metal & it can cut line faster (in most cases) so I do more tie offs in a wreck and try to avoid my line running over a piece of metal.

As far as wreck diver being better than a cave diver or the other way around.... No...each is its own skill set, but one can do the other but as said above the only way to be "better" is to do more of each.