While the OP probably made their choice back in 2019, I like these ongoing threads as reference points for specific lens A vs lens B battles. It has, however, caused GAS over the 15 years I've been hanging around RFF. And I always enjoy the images of those who post examples.
I'd probably choose the CV50 2.5 color skopar for travel, where there might be a bit more wear and tear or dust around. Not to say I don't like the other choices available, and it would depend if I was pairing a 50 with a wide lens too, to try to match the signature across lenses on a trip. Or alternatively to have two different looks out of the camera.
I'l drop this here for interest in sizes of some of the compact 50s. Apologies for the quick phone snap. At the time I didn't think to add the 40s (Rokkor, Rollei CV) which could have given a bit more info.
best,