Both have vanos - the M62 is the "old" design - the N62 the "new" design - wikipedia has information on both. The N62 has double vanos (as opposed to single) and the variable valve lift.
Whether Evolve/DMS will touch the Aero engine is another matter entirely. The engine is now "old tech". However, it should still feel pretty sprightly - so trying to gain a few extra BHP is not going to make too much difference.
I'd like to see the S65 in an Aero - preferably in B44 guise - now that would be something quite special
