If you're looking for razor sharp detail and rendering, look at the Zeiss -- it'll be less than a Leica ASPH, which also is similar in sharpness, detail, etc.

No Leica lens is ever really 'bad', just subtly differing character. I have an older v1 35 'cron and like it a lot, but I'm guessing it has a bit more 'glow' or what have you than a v4 or ASPH.