I just read Tim Rudman's newsletter review of these two papers. He spoke very highly of the Classic but had less time to test the cooltone. Specifically mentioned the Classic's noticeable increase in sharpness and d-max, good separation in the highlights. I don't want to paraphrase too much. I'd recommend everyone sign up for his newsletter and read for yourself.
Most importantly (to me), he confirmed the Classic does not Lith, but yields nice results in second pass lith.
He did not have a chance to test the Cooltone in lith printing, so the jury is still out on that one.
If anybody gets a chance to try the cooltone in lith, please post your results!
I'll be buying/trying it for myself after the holidays...
EDIT: I just want to add that the reason Lith-ability is important to me is because it can be hard to find a great photo paper that is also a great lith paper. The majority of my printing is still traditional printing but more and more I'm lith printing, finding it's another tool to make negatives sing that might make only mediocre prints using traditional developer. Appending this info since I know the Ilford folks are watching. And yes, MGWT is fantastic and I'm well stocked with it. Please don't ever stop making MGWT!