My thoughts regarding Indy/Super Indy is that the spokes finish is different. My Super is polished, whereas all Indy's I've seen are brushed. Awaiting delivery of an Indy as well (shipped today), so if any other differences I will report back.
There's another variation of Indy's, model KBA 70099, which I believe came as an OEM accessory with some late 80's Mercedes. The most important difference is that the spokes are black (and IMO looks AWESOME)
http://www.2040-parts.com/_content/i...509116/001.jpg
They do also come with a crashpad.
http://www.lenkradshop.de/WebRoot/St...olzlenkrad.JPG
BTW all of them come in different types/shades of wood