The EB-4 is in a rebuild right now and TTR parts are usually hard to get. The Hyper 7 is no longer the current model. The Hypers are at 8.5 now and it is one of the most locked in buggies I have ever driven. Lots of bang for the buck!
I'm not as familiar with the TTR but I know the Hyper's parts are cheap and plentiful.
TEX