Hey Paul.

In all honesty, I don't think you'l find a whole lot between the 3. The thing to look for is the best shaft of the 3 and make sure its the right flex and gives you the right trajectory. I know MD clubs come with good shafts and I suspect the others do too. You certainly wont go far wrong with any of them.

if you can't find the actual clubs to try, then maybe finding out which shafts are in which driver, then going to AG or somewhere, finding another make of driver with that shaft in and trying that may give you a feel for one or the other. Not the best way but it might help you narrow it down.