Fujifilm 150 600mm f 5 6 8 vs fujifilm 100 400mm f 4 5 5 6?

Here is what the site says about that.

From Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR: What it frames like: - On APS-C (Fujifilm X): like 150-600mm on full frame; f/4.5-5.6 gives about the depth of field of f/6.8-8.4 there.

From Sony FE 100-400mm f/4.5-5.6 GM OSS: What it frames like: - On full frame (Sony E): as marked, 100-400mm. - On APS-C (Sony E): like 150-600mm on full frame; f/4.5-5.6 gives about the depth of field of f/6.8-8.4 there.

Quoted from this site's pages.