I like my Samyang 35mm f/1.2, and it is the lens I use most often with my Sony alpha 6000. It gives me superb photos even in bad lighting, but it produces some distortions at the edges though - but this bothers me rarely.
I consider buying the Mitakon Speedmaster 35mm f/0.95, as its aperture would have an area of 1066 square millimeters (as compared to the Samyang with 668).
Is it worth going from 1.2 to 0.95? Apart from spending the money, is there a reason against it?