Comparison would very much depend on your speaker requirements. That said,I agree with Aball's comments with the exception of the looks, my prerefence being the shorter MC252. They are similar in proportion to the MC501's & easier to manage.
I have not heard both in the same system so cannot comment. I have previously owned a MC352 & now own a MC252 in the same system. I prefer the 252, which to me sounds more real. Another comment I have read is the 252 is more similar in sound to a 501 than a 402.
I would urge you to visit the Audiokarma McIntosh forum (if you haven't already) and read comments made by Ron C. on the MC252. Sometime you have to read between the lines :).
Also in my experience, using a Mac Pre with a Mac power makes all the diffence.
Good luck!
I have not heard both in the same system so cannot comment. I have previously owned a MC352 & now own a MC252 in the same system. I prefer the 252, which to me sounds more real. Another comment I have read is the 252 is more similar in sound to a 501 than a 402.
I would urge you to visit the Audiokarma McIntosh forum (if you haven't already) and read comments made by Ron C. on the MC252. Sometime you have to read between the lines :).
Also in my experience, using a Mac Pre with a Mac power makes all the diffence.
Good luck!