Grandal - he will stick at catcher, will be adequate on D but better all around hitter though with a bit less power than Mes. Mes will be the better defender but less of a hitter - more power but other than that Grandal will outhit him in about every other area - BA, SP, OPS. Mes is patient enough he will likely be close in OBP. A player's offense tends to color his perception as a player overall and Grandal will get the nod because of that, although Mes will be the better catcher.