I looked at the Spectrograms before listening. The files do indeed appear to be different; there are different peaks and 'pops' from the vinyl.
Over all, it looks like Sample A has higher, quicker transient peaks. I'm sure it's a case of self-fulfilling prophecy, but I liked Sample A better when I listened. They are both very similar.
At least 'on paper', I liked A better. Maybe I'm a fool?
edit: damn, I love these listening tests!