Nikon z 180 600mm f 5 6 6 3 vr vs nikon 100 400mm f 4 5 5 6?

Here is what the site says about that.

From Nikon Z 180-600mm f/5.6-6.3 VR: Nikon Z 180-600mm f/5.6-6.3 VR: A zoom lens by Nikon for Full frame cameras, 180-600mm f/5.6-6.3. Specs - Maker: Nikon - Focal length: 180-600mm (zoom) - Maximum aperture: f/5.6-6.3 (it gets darker as you zoom in) - Made for: Full frame sensors - Mounts: Nikon Z - Stabilised: yes - Autofocus: yes What it frames like - On full frame (Nikon Z): as marked, 180-600mm. - On APS-C (Nikon Z): like 270-900mm on full frame; ...

From Nikon Z 100-400mm f/4.5-5.6 VR S: Nikon Z 100-400mm f/4.5-5.6 VR S: A zoom lens by Nikon for Full frame cameras, 100-400mm f/4.5-5.6.

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