Crappy OFNA marketing. The problem is that OFNA is an importer, and they import buggies from two different manufacturers.
The quality between the two manufacturers varies greatly.
First is the HoBao Hyper series of cars. These care are FAR superior to the standard fair MBX/LX Comp based cars.
Then you have the Hong Nor line of imported cars, these cars are known under the names, MBX R2 MBX Pro, Ultra GT Worlds, Ultra LX Comp, Ultra LX 2, LX One, And then they have 9.5 versions of all the cars... etc......Its the same buggy rehashed a billion times, and its STILL Crappy. The ONLY Hong Nor cars worth anything are the Jammin series, and the 9.5 MBX Pro (identified by its yellow plastics, pillow ball suspension, and Orange anodized shock towers, this is the only MBX that can take a beating and ask for more), and finally the Jammin line of cars that Jay Halsey is pushing, which guess what, is based on the MBX line of cars.
If you can get a Hyper 7 its a good car, a Hyper 7 PCR is a GREAT car. Light, fast, and durable. If you can drive and you showed up at a local club race with one you wouldn't be left in the dust. The only thing i find annoying about the Hyper line of cars is the lack of threaded shock bodies. The Hyper 8.5 is a good car.
So bottom line, if its an OFNA car the only ones worth looking at are the Hyper 7/8, and Jammin lines. If a 9.5 MBX Pro falls in your lap, don't turn it down, but don't go looking for one.
Jeff can verify the hell i put my Jammins (both buggy and truggy) through.
That said, if a Mugen MBX5 comes your way for a good price buy it. But you wouldn't be dissapointed with a Jammin.