[Kunzite]

The glass is the same. The coatings are the same, despite pentax marketing blurb. A rebadged Pentax.

The Tamron is better (renders quite a bit nicer, without the CA issue)

You're just trolling.
First, you don't have a way of knowing if lens elements or coatings are the same.
Second, the lens is not a rebadge but a customization of the Tamron. There are physical differences, besides the cosmetic outer ones, the mount and electronics/firmware.
Third, you're lying that the Tamron is better.

---

That sounds like DPreview forum talk to me ....

The DPReview forum talk is filled with non-Pentaxians and Pentaxians with old gear that have no intention of ever buying Pentax again, but are heavily criticizing the brand for all sorts of reasons. Including that Nikon dude abusing the '.' key.
Probably not negative enough for you.