Yongnuo yn25mm f 1 7m vs olympus m zuiko 25mm f 1 8?

Here is what the site says about that.

From Olympus M.Zuiko 25mm f/1.8: Olympus M.Zuiko 25mm f/1.8: A prime lens by Olympus for Micro Four Thirds cameras, 25mm f/1.8. Specs - Maker: Olympus - Focal length: 25mm (prime) - Maximum aperture: f/1.8 - Made for: Micro Four Thirds sensors - Mounts: Micro Four Thirds - Stabilised: no - Autofocus: yes What it frames like - On Micro Four Thirds (Micro Four Thirds): like 50mm on full frame; f/1.8 gives about the depth of field of f/3.6 there. ...

From Yongnuo YN25mm f/1.7M: Yongnuo YN25mm f/1.7M: A prime lens by Yongnuo for Micro Four Thirds cameras, 25mm f/1.7. Specs - Maker: Yongnuo - Focal length: 25mm (prime) - Maximum aperture: f/1.7 - Made for: Micro Four Thirds sensors - Mounts: Micro Four Thirds - Stabilised: no - Autofocus: yes What it frames like - On Micro Four Thirds (Micro Four Thirds): like 50mm on full frame; f/1.7 gives about the depth of field of f/3.4 there. ...

Quoted from this site's pages.