I wouldn't buy either of them until the SoC voltage problem which is blowing up Ryzen 7000-series CPUs on some ASUS motherboards is confirmed to be fully resolved.
You would probably be fine as long as you make sure you update your BIOS to the latest version, as these problems are supposed to have been fixed in new versions released a few days ago, but I would recommend waiting another week or so in case it turns out the problem isn't properly fixed. If you buy one of these motherboards new today (2nd May), it is very likely it will come with a defective BIOS which could damage your CPU if you enable XMP or EXPO.
After a string of AMD CPUs and Asus motherboards were burning out in desktops, Asus has come forward with an explanation – along with repair experts.
www.dexerto.com
Similar problems have been seen on Gigabyte motherboards, but ASRock and MSI motherboards do not seem to be affected.
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Aside from the voltage issue, in my opinion the Strix is only worth buying if you're really into overclocking with exotic cooling. The TUF's 14+2 70A power stages are more than enough for a heavily overclocked Ryzen 9 7950X with a high-end tower or AIO cooler. The Strix has 16+2 90A power stages, which could help with overclocking if you're using dry ice or a high-end TEC or water chiller, but won't really matter for normal PCs.
The Strix has 2 extra rear USB ports, and some of its USB ports provide more bandwidth, but the 10 ports of the TUF is already enough for most people. The TUF also has an extra header for front USB ports.
The Strix has a slightly better audio codec/soundcard, but the difference is unlikely to matter except to audiophiles and professionals, and most of them would use external soundcards anyway.
Other than that, the features of these 2 motherboards are basically identical.
Both motherboards include WiFi 6E and Bluetooth v5.2.
Strix has never been a brand for people who want good value, it's for people who want overkill cooling and RGB.
X670E itself is also a waste of money if you won't use the extra PCIe lanes that it provides over B650. Even if you really want support for PCIe 5.0 in both your main M.2 slot and GPU slot, you can get that from much cheaper B650E motherboards like the ASRock B650E PG Riptide WiFi, which has a similar VRM and the same number of rear USB ports (albeit most of them are low-bandwidth USB 2.0 ports) as the X670E TUF. Fewer PCIe lanes means it only has 3 M.2 slots rather than 4, and one of its M.2 slots is only PCIe 3.0 x2, but 3 M.2 slots and 4 SATA ports is still plenty of storage. The ASRock B650E Riptide also has the upside that using the wrong BIOS won't make your CPU explode.
