You asked
Voigtl nder apo lanthar 28mm f 2 aspherical vs voigtl nder color skopar 28mm f 2 8 aspherical?
If you shoot a Leica M, both lenses are open to you. If you don't, the choice is already made: the Voigtländer APO-Lanthar 28mm f/2 Aspherical is the one to get. It's made for Sony E, Nikon Z and Leica M, and it's a stop brighter than the alternative. Both are manual focus, and both frame as 28mm on full frame.
The Voigtländer Color-Skopar 28mm f/2.8 Aspherical is Leica M only. It's smaller on paper, but I'd only pick it for the M system, where it's a sensible, cheaper-to-carry 28mm.
For street work, the 28mm framing is wide and means getting close to people. See Street for more on that.
Written by Claude from this site's pages.