Sony fe 300mm f 2 8 gm oss vs sigma 200mm f 2 dg os sports?

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From Sony FE 300mm f/2.8 GM OSS: Sony FE 300mm f/2.8 GM OSS: A prime lens by Sony for Full frame cameras, 300mm f/2.8. Specs - Maker: Sony - Focal length: 300mm (prime) - Maximum aperture: f/2.8 - Made for: Full frame sensors - Mounts: Sony E - Stabilised: yes - Autofocus: yes What it frames like - On full frame (Sony E): as marked, 300mm. - On APS-C (Sony E): like 450mm on full frame; f/2.8 gives about the depth of field ...

From Sigma 200mm f/2 DG OS Sports: Sigma 200mm f/2 DG OS Sports: A prime lens by Sigma for Full frame cameras, 200mm f/2. A stabilised fast telephoto prime for indoor sport and portraits. Specs - Maker: Sigma - Focal length: 200mm (prime) - Maximum aperture: f/2 - Made for: Full frame sensors - Mounts: Sony E, L-Mount - Stabilised: yes - Autofocus: yes What it frames like - On full frame (Sony E, L-Mount): as marked, 200mm. - On APS-C (Sony E, ...

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