Rodenstock and Schneider both made different grade lenses with different model names. For instance Rodenstock made the following in 50mm:
Rogonar
Rogonar S
Rodagon
Apo Rodagon N
And for 30% larger magnification at the same head height as a 50mm
WA Rodagon
If you can find one and afford it:
45mm Apo Rodagon N
No 75mm will give you the best quality prints. They are budget low end lenses. For 67 for best results you need one of the following:
80mm
90mm
105mm
Or the WA 60mm
For 45 best results would be:
135 Rodagon
150Rodagon
120 WA Rodagon
If you want huge prints (30x or more) you need a lens like the Rodagon G
Best performance from any enlarger lens will be 2 stops down from wide open. Enlarger properly aligned and the film in a glass carrier and printed at the optimal magnification range for the lens.
If you don’t do this then the lowest grade lens will probably suffice.
Leitz used the Apo Rodagon N to replace the Foctar when it was discontinued.
No lens, other then the lens the cam was cut for will auto focus on a mechanical focus enlarger. Even if you had, for instance, the Kaiser electronic AF enlargers you would have to reprogram it if you change lenses for a different one, even if it is the same model lens.