Canon rf 20 50mm f 4l is usm pz vs canon 24 50mm f 4 5 6 3?

Here is what the site says about that.

From Canon RF 20-50mm f/4L IS USM PZ: Canon RF 20-50mm f/4L IS USM PZ: A zoom lens by Canon for Full frame cameras, 20-50mm f/4. A full-frame video zoom with a built-in power zoom you can switch to manual. Specs - Maker: Canon - Focal length: 20-50mm (zoom) - Maximum aperture: f/4 - Made for: Full frame sensors - Mounts: Canon RF - Stabilised: yes - Autofocus: yes What it frames like - On full frame (Canon RF): as marked, 20-50mm. - On APS-C ...

From Lenses: Your first lenses: 1. A standard zoom, 24-70mm or 24-105mm equivalent. The kit zoom is fine to start. 2. A fast standard prime, a 50mm f/1.8 on full frame or a 33-35mm f/1.4 to f/1.8 on APS-C. Low light, people, food. 3. Then add for what you shoot: a telephoto zoom for wildlife and sport (wildlife and sport), a wide zoom for landscapes (landscape), or an 85mm for portraits (portraits).

Quoted from this site's pages.