Upload & Sell: Off
I had the 180/2.8 Ais and shot some music concerts with it and used it from time to time over a couple of years. Great lens. In the last legs of film I had the AF version and they were equal. Judging from older MTF scorings and tests they were very close and by all means equal in real life shooting conditions. I preferred the manual version for handling.
I preferred both slightly over the 180/2.8 Contax lens, and for close range I thought them slightly better than the 180/3.4 APO-Telyt (which by default is almost useless for portraits due to long/poor min focusing distance). For distant shots the APO-Telyt was visibly better though. The Canon EF200/2.8 I thought was a very fine lens too, quite comparable to the Nikkors.
For me, the best of all 180/200mm lenses was clearly the 180/2.8 APO Elmarit. And, over the years I had a few. But, for practical use I preferred the APO-Telyt and ended up keeping it, using other focal lengths for short distance work.
For a short period I used a Dynax/Maxxum outfit (in between system stop gap solution) and the Minolta APO 200/2.8 was an amazing lens. And I'd almost dare say it was probably on par with the APO Elmarit though perhaps not around infinity.
Haven't seen/tried the Mamiya 200/2.8 though.
Other 200mm lenses have been:
Contax Tele-Tessar 200/4 and the 200/3.5, Nikkor 200/4 (crap, I thought), Tamron 180/2.5. Most of them very fine lenses.