In reality, the only thing that was designed is the bracket. The caliper, forks, wheel, and disk are all just off-the-shelf items, so variation will exist. And even then, mopeds are still mopeds and have little to no funding behind R&D at this point, outside of Malossi/Polini and some smaller European manufacturers.
And even those folks aren't super interested in developing fork/wheel/brake innovations.