Ozil is more direct in dribbling and takes more risks, looses more balls than Modrić, Ozil plays in the hole while Modrić is really a lot deeper positioned player, Ozil gives the final pass, while Modrić organizes the whole teams play. Other than the fact that both players are more passers than goalscorers i see no similarities between then, plus, Madrid has enough firepower up front with Benzema, Ronaldo, Higuain and even Di Maria chipping in. They've looked clueless against Barcelona IMO throughout the most games in the last couple of season just because they didn't have a player like Modrić that controls that middle of the park with authority, and that's what Luka does, while in Barca you have Xavi and a lot of players that can do the same, Madrid relied on long balls, and quick passing, counter attacking football. For me, it's harder to play that kind of football for the whole game, you have to be more skillful to react that quick and react intelligently, Ozil Ronaldo and Benzema have done that great, but they loose balls and that kills them against Barcelona, now they have a player that can control the tempo of the game.