Tamron 16 30mm f 2 8 di iii vxd g2 vs sigma 16 28mm f 2 8 dg dn contemporary?

Here is what the site says about that.

From Tamron 16-30mm f/2.8 Di III VXD G2: Tamron 16-30mm f/2.8 Di III VXD G2: A zoom lens by Tamron for Full frame cameras, 16-30mm f/2.8. A 440-gram f/2.8 ultra-wide zoom that does not extend as it zooms. Specs - Maker: Tamron - Focal length: 16-30mm (zoom) - Maximum aperture: f/2.8 - Made for: Full frame sensors - Mounts: Sony E, Nikon Z - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E, Nikon Z): as marked, 16-30mm. - ...

From Sigma 16-28mm f/2.8 DG DN Contemporary: Sigma 16-28mm f/2.8 DG DN Contemporary: A zoom lens by Sigma for Full frame cameras, 16-28mm f/2.8. Specs - Maker: Sigma - Focal length: 16-28mm (zoom) - Maximum aperture: f/2.8 - Made for: Full frame sensors - Mounts: Sony E, L-Mount - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E, L-Mount): as marked, 16-28mm. - On APS-C (Sony E, L-Mount): like 24-42mm on full frame; f/2.8 gives about the ...

Quoted from this site's pages.