The entire proportion, size and shape of the toe box on the retros is different from the OGs. When I put my retros next to my same-size OG black/reds, it's glaringly obvious how different they are. The OG toes are visibly narrower and shorter.
As has been noted many times, the OGs were kind of all over the place in terms of PL height. This early sample pair MJ is rocking here, yeah the patent is lower than it is on the current retros, but it's still not low like it was on the crap 2011-era retros. The whole shape of the shoe is a lot different on the OGs than those retros, too. People tend to simplify it and just say, the previous retros were different because they had low PL. But that was just one thing that was jacked up about those shoes, it wasn't like it was the same shoe as always and they only lowered the patent height. The entire build was off.
You can see how much of a role overall proportions and shape play by putting, for example, a pair of DMP XIs next to the 2011 retro. Compared to the latest retros, the DMP had low patent, too. But the shoe's shape and proportions overall, and the way the patent is cut and works with the overall shoe, is massively different. The DMPs looked "right," for the most part. The 2011s did not.