Yep, just different stickers. The meshwheels could be different also because each place does there own.
I had mine running for about 1-2 months on a 70 gallon frag tank...but decided to simplify my system and plumb it in with the main system which runs a reeflo orca 250, so the msx 200 wasn't needed anymore. It ran great for the time I had it. They are a little touchy at first if you decide to use the meshwheel, some are balanced and some are not and need to be re-meshed or they get loud and have start up issues. I know they now have a "purple" pinwheel that is suppose to pull the same numbers as the mesh with no start up issues so you may want to look into one of those.
$for$ these are one of the best skimmers on the market today. There is a VERY long thread going on RC if you haven't seen it you should sit down for a (ok many) hour and read it, has all sorts of great info. Its in the lighting and filtration forum. Also, marine solutions has a forum on RC that alot of owners post on.
They are pretty plug and play...at least for me it was. I just set it up on a stand in about 8" of water and let it rip! I sold the skimmer to scott and he in turn has let Jordan from Waves borrow the skimmer and he has been running it for a month or so now. I talked to him last week and he said that it is really touchy in his system, skimming wet then dry, then wet again....so take that for what its worth.