Chipset naming: MT7921AU vs. MTK7921AU

[AnaMarkH]

I found the following WiFi USB stick: Delock Wi-Fi 6E Dualband WLAN USB Adapter AX3000 (2 x 1201 + 574 Mbps) (Prod. No. 12773) https://www.delock.de/produkt/12773/merkmale.html?setLanguage=en

According to the technical details, it has the Mediatek MTK7921AU chipset.

Online search for "MTK7921AU" seems to give primarily european sites with one exception: https://www.amazon.com/EDUP-Wireless-802-11AX-Tri-Band-Compatible/dp/B0CZ82RM5L lists the EDUP AX3000M and also states MTK7921AU.

mediatek.com knows MT7921AU only; an MTK7921AU cannot be found.

Hence, I wonder, whether this is the same chipset than the MT7921AU (without the "K").

It would be good to add a note about the MTK7921AU to the site (even if it's just saying "There is also a Mediatek chipset named MTK7921AU; currently it is unclear to what extent it differs from the MT7921AU.").