SHOOTOUT: Sony FE 16-35mm f/2.8 GM II vs Sony FE 12-24mm f/2.8 GM @ 16mm: End of Road, White Mountains
This shootout from f/2.8 to f/11 pits the Sony FE 16-35mm f/2.8 GM II at its strongest zoom setting of 16mm against the reference standard, the Sony FE 12-24mm f/2.8 GM.
Sony FE 16-35mm f/2.8 GM II vs Sony FE 12-24mm f/2.8 GM: End of Road, White Mountains
Includes images from f/2.8 through f/11 at up to full camera resolution, plus crops.
Pretty much all you need to know for wides on Sony.