I'm ready to drop a few dollars into an entry level fountain pen and decided on the Pilot Metropolitan. When searching Amazon I see the MR Animal Collection which seems to be the same pen, but with a different accent pattern printed on the end of the barrel. Do any of you know if there is any difference between these pens? The Animal pen was actually in stock and cheaper with Prime shipping. I thought the black w/alligator looked pretty nice. I would also appreciate any suggestions on a simple black or blue ink to start with. Main use for this pen will be writing cards and letters at work. Thanks for the help!