The decision is a personal choice. Put two copies of the shot on the screen, one in color and the other in B&W. If you like the B&W better then that is what it should be. Your choice is the only one that counts. B&W almost always looks better with a lot of contrast. In this case the B&W shot looks to be on the flat side so I vote for the one in color.
This looks like a really high quality scan of a vintage photo. If not, it's some really good editing and post-production of the image to capture that feel.