Adam will be up sooner than Andrew IMO.
A guy I work with who is a huge Indians fan (we have a steak lunch riding on a bunch of Sox/Indians bets) thinks Miller will be called up to close if their pen keeps pitching like it has. I think he's nuts and they'd move Carmona back to the pen and let Miller start, but he is a somewhat smart guy and admittedly knows more about the tribe than I do.
Either way, Adam will be up sooner and have a bigger impact. The only reason Andrew got called up last season is because it was in his contract.