So those two sets are just pvc (?) novelty caps, and yeah, “gummy” is not wrong. I didn’t get any of the OEM ones with branded properties like Harry Potter or Marvel, but they look like standard ABS gamer board stuff.
I don’t really know high end or artisans, but my PBT clone sets from Aliexpress (see lower left and lower right) and XVX cheapos feel way, way better.
NotTheOnlyGamer