These two are at the same aperture A has loads more DOF than B. In this case I like B better as the shallow DOF gives it the type of 3D/depth effect that some here don\'t approve of.
With two images it actually becomes easy. The 50 MP, being a macro lens must be better corrected for geometrical distortions than the planar. B shows barrel distortion relative A. B also still has vignetting, which I guess should be gone by f/2.8 on the planar.
\"A\" must be the Makro Planar and \"B\" the Planar.