I have the black Bessa R and the silver Bessaflex, which I believe is the same silver finish as the Bessa R in silver. It is soft and scratches easily. I believe, based on my limited experience, that the black will hold up better over time. Pity, because I like the silver finish on my Bessaflex, but she's already scratched after only a few weeks - the Bessa R is clean as a whistle after a year or so.
This is only my experience - your mileage may vary!
Best Regards,
Bill Mattocks