Damn, I'm waiting for my monos in the mail.
I have listened to Mono versions from LP (Purple Chick) and the differences with the stereo versions are significant. The bass is really special on the monos and a general more rocking feel. There are various web sites that talk about the the mixing differences but I think Bongofury nails one of the big things. The original Monos were mixed on high quality boards while the stereo versions were done on early stereo mixing boards.
I have listened to Mono versions from LP (Purple Chick) and the differences with the stereo versions are significant. The bass is really special on the monos and a general more rocking feel. There are various web sites that talk about the the mixing differences but I think Bongofury nails one of the big things. The original Monos were mixed on high quality boards while the stereo versions were done on early stereo mixing boards.