Bathroom A is marginally closer.
Bathroom B is a lovely shade of pink.
Bathroom A has a very effective fan, which is always a plus when it comes to public rest rooms.
Bathroom B has no fan to speak of.
Bathroom A has no water pressure, so you're lucky to get a drizzle to wash your hands with.
Bathroom B has rockin' water pressure.
Bathroom A is strategically laid out so that you can open the door with your paper towel and then throw it in the trash while holding the door open with your foot.
Bathroom B is much larger, so the trash can is out of reach. You must carry your paper towel hand protector to the trash can in the hall for deposit.
Bathroom A has a full length mirror, so you can see how your ass really looks in those jeans.
Bathroom B is farther away, so you can walk off some of that Twix bar that is rapidly going to your ass.