well i have MM5 + P5 on my yamaha BBG5a.
the MM is more bridge side and you can tell but it isnt a problem, especially when you pop both pickups on. i have the P5 with the 3 at G D A and 2 at E B bridge side. here is a pic
the other problem is that the pickups do well with separate pre amps (very expensive), as the 2 types do better with different EQ settings. i have had no problems tho the seymore duncan 3 band really opens up the tone of both pickups.