The Mark amps can be super mid forward, that is why so many people use the eq in the V mode to pull some or most mids out.
The JP2C is a bit more mid forward but that Mark EQ can change that. I know some of the folks in here have Mark's w/o the EQ and a few of them put an EQ in the loop to make up for it. I "think" I have gathered from other users coments that the non EQ ones have differnt tone stacks that sort of make up for no EQ? I have not touched one though, just from what others have said about them still being absolutly brutal sounding amps and I know w/o the EQ my Mark V and JP2C sound very thin and shit.