I voted A, because unless I entomb coin B in a slab, airtite or 2x2, in less than 50 years time it'll most likely look just like A again, or even worse.
The only advantage in picture A is that you can see the details better; these are scans, so I'm not sure how this difference translates to a difference in actually seeing the coin in hand before and after.
Quote:
...Had that big patch of black stuff you can see in the inner circle and such. What the don't clean fans like to call "patina" or "toning" was definitely "dirt" and "crud" as coindexter said...
Scans are normally pretty good at telling apart tarnish/toning/patina from adhered dirt/goo/gunk. That looks like regular tarnish/toning to me.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis