Leica apo summicron m 90mm f 2 asph vs leica elmarit m 90mm f 2 8?

Here is what the site says about that.

From Leica APO-Summicron-M 90mm f/2 ASPH: Leica APO-Summicron-M 90mm f/2 ASPH: A prime lens by Leica for Full frame cameras, 90mm f/2. Specs - Maker: Leica - Focal length: 90mm (prime) - Maximum aperture: f/2 - Made for: Full frame sensors - Mounts: Leica M - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Leica M): as marked, 90mm. Cameras it fits - Leica M9: Full frame - Leica M9-P: Full frame - [Leica ...

From Leica Elmarit-M 90mm f/2.8: Leica Elmarit-M 90mm f/2.8: A prime lens by Leica for Full frame cameras, 90mm f/2.8. A common, affordable used 90mm. Specs - Maker: Leica - Focal length: 90mm (prime) - Maximum aperture: f/2.8 - Made for: Full frame sensors - Mounts: Leica M - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Leica M): as marked, 90mm. Cameras it fits - Leica M9: Full frame - [Leica ...

Quoted from this site's pages.