I had this conversation with my bro a few days ago, and Aikman was the name I threw out there. He just finds a way to win.
I didn't see much of Montana, but from what I understand, Trent plays along those lines. A cerebral quarterback who will take what you give him, and always seems to know where to go with the football. Montana is well-known for playing under pressure, and Edwards has already at this early stage shown the moxy needed to shine (and sometimes lead a comeback) in the late stages in the game. Pressure, whether from the defense or the game situation, just doesn't seem to get to him.
The Brady comparisons are obvious...clearly not calibre (yet?), but style. Both guys find ways to lead their teams to wins* without being flashy, neither have cannon arms but can make all the throws, both throw the ball accurately to maximaze YAC, both guys (again) seem to have a way of just always knowing where to go with the ball, and both guys are masters at not seeing, but sensing the rush, and just taking the small step or two that will make all the difference.
It will sure be something if Trent becomes the next Brady the 100% legal way.