IT depends greatly on what you want out of the figure.
Either something you can play with, or something you can display. I.e. something that plays well, or looks great.
The takara is a play with figure. Buttload of accessories, bruce in gear version or full bats version, very poseable, etc. The negatives of that are obviously the thinner suit, the thinner body, the joint in the cowl being a bit obvious and the honkey feet. Plus he he has a bit of a thin cape its like one piece of material i hear.
Hot toys is pretty damn stiff, he can do poses but it requires time and patience and care, so you don't damage the suit as its tight. BUT its VERY accurate. Probably the closest to the film, because its an actual under suit with rubber armor on it, like the real suit. Taks is just solid rubber from what i've seen. The HT has the solid neck/head its a good sculpt not quite as much personality in the face as taks but still decent. And he has good size and proportions. The armor is all solid and smooth looking no breaks or gaps (such as taks hip flaps). He has decent accessories but just basic stuff, grappel gun, batarangs, and bomb, and some hands. Cape is very nice, double layers of fabric sewn together and its massive.
I went with the Hot toys, over the others, but also mainly because the Tak was near impossible to get before this rerelease and garnered $300 prices on ebay, but still my personal choice was accuracy over playability and to me HT looked best
IF its a choice you want to make, you dont even need to consider medicom, its between hot toys or takara, and its dependant on the things i mentioned above and your personal preference, but if i have to say anything its dont even look twice at the medicom, just forget it even exists.