The race is finally starting

Intel
AX200: 2x2MuMIMO, 600Mbt/s 2.4Ghz+2.4Gbt/s 5Ghz, BT5, standard M.2 PCIe
Killer 1650x: Is actually an Intel AX200
AX201: 2x2MuMIMO, 600Mbt/s 2.4Ghz+2.4Gbt/s 5Ghz, BT5, M.2 CNVio
Killer 1650i: Is actually an Intel AX201

Qualcomm
Fn-Link 8291M-PR (QCA6391): 2x2MuMIO, 573.5Mbt/s 2.4Ghz*, 1201Mbt/s 5Ghz, BT5.1, standard M.2 PCIe

*Interesting, the FCC document shows 400Mbt/s on Wireless-N.

Notes: The Dell XPS-9300 should soon be shipping with Killer 500 DBS which is also based upon the QCNFA524/QCA6391 (will be soldered, however, so excluded from the list).

Sources
DeviWiki: https://deviwiki.com/wiki/List_of_802.11ax_Hardware
Wireless CAT wiki: https://wikidevi.wi-cat.ru/List_of_802.11ax_Hardware
Qualcomm Atheros QCNFA524
https://wikidevi.wi-cat.ru/Qualcomm_Atheros_QCNFA524
For a list of all currently documented Qualcomm Atheros (QCA) chipsets with specifications, see Qualcomm Atheros. AX1800 WiFi 6 BT 5.1 NGFF M.2 Combo Module...

https://wikidevi.wi-cat.ru/Intel_Wi-...X200_(AX200NGW)
https://wikidevi.wi-cat.ru/Intel_Wi-...X201_(AX201NGW)
FCC: https://fcc.io/J9C/-QCNFA524
FCC ID Search and Redirection
https://fcc.io/PD9/AX200NG

FCC ID Search and Redirection
https://fcc.io/PD9/AX201NG

Intel: https://ark.intel.com/content/www/us...i-6-ax200.html
https://ark.intel.com/content/www/us...i-6-ax201.html
AliBaba: https://ofeixin.en.alibaba.com/produ..._1_Module.html (there appear to be more options as well)

//Dell: https://topics-cdn.dell.com/pdf/xps-...uide_en-us.pdf//

Update: The QCA6391's maximum theoretical 5Ghz speed on AX is 1201 Mbt/s

It would be great if others can chip in.