Most starter boxes you find have the same internals(2 or 3 designs anyways). The box and alignment pins are what seem to differ the most. Ive had the blue OFNA knock off box and it worked well. That being said, the plastic brackets and alignment pins weren't my favorite. Ive since moved onto the ultimate racing boxes. The alignment tabs are aluminum and mount directly to the aluminum top and not to a plastic bracket. I will say, the wheel that came with it turned to dust instantly the first time I had a new engine stick at TDC. After that i replaced it with the protek wheel and have not had an issue since. Im wondering if there are just different runs of wheels that are slightly different material/hardness?

EDIT: probably self explanatory, but for simplicity, here are links to the boxes I'm talking about.
Ultimate Racing starter box

Blue OFNA style