The table below shows the main specs for both Wi-Fi cards.
|Wi-Fi technology||Wi-Fi 6||Wi-Fi 6E|
|2.4 GHz conducted power||+22.5 dBm||+16 dBm|
|5 GHz conducted power||+23 dBm||+11 dBm|
|Bluetooth conducted power||+11.4||+11.5 dBm|
Summary of differences
Wi-Fi 6 vs 6E
By implementing Wi-Fi 6E technology, the Intel AX210 supports the new 6 GHz frequency band. This band has 1200 MHz of new contiguous spectrum. This is twice as wide as the 5 GHz band.
Wider bandwidths quite simply translate to faster throughput.
The Mediatek part has higher levels of Wi-Fi transmit power which translates to longer ranges. Power is specified in dBm (use this calculator to convert from dBm to Watt)
The Intel part supports a newer version of Bluetooth (5.3) relative to an older version (5.2) in the Mediatek.
The main improvements in 5.3 relative to 5.2 are:
- Device performance,
- User experience and
- Power consumption.
Reddit user fadilke2 ran some real world tests to compare the 7921 with the 210. With a slower router that could support only 12.5 MB/s, they found the following speeds with each card:
- MT7921 – 7 MB/s
- AX210 – 12 MB/s
As well, in both cases, turning Bluetooth On impacted the speed significantly.
- MT7921 – 1.3 MB/s (with occasional disconnects)
- AX210 – 8 MB/s
The 210 had better performance overall; both with and without interference due to Bluetooth.
MT7921 vs MT7921K
There is a newer version of the Mediatek card with suffix ‘K’. The MT7921K supports Wi-Fi 6E. The version of Bluetooth is however 5.2 and it has not been upgraded to 5.3.
The technologies included in this new variant are: 2×2 802.11ax (WiFi 6E) + BT/BLE.
 Intel AX210 Test Report FCC ID: PD9AX210NG
 MediaTek MT7921 Test Report FCC ID: RAS-MT7921