Help with C1 and 2nd keyboard,

[Rusty]

Hi guys,
I gig with a 76 Nord stage 2 and a korg M3 61 key,
I was looking at a 2nd hand Nord C1 for either rehearsals or gigging if the sounds were good,
I'd like to know if there is much difference in sound between the C1 and the Ns2 and also the fact that I use aftertouch for rotary and the wheel for adding extra drawbars during solos, or also reducing drawbars using the wheel on other presets for quiet parts,
Does the C1 have the ability to do these things,
Also my other main point, as I use two keyboards, I was thinking that as the m3 is essentially a module connected to a keybed, could I remove my m3 module and midi it up to the C1 and use the top keyboard and the bottom keyboard for M3 sounds in certain presets and then revert back to either Nord bottom korg top or just both Nord,
Thanks for any help, Kind Regards, Brendan,