I don't have experience with those particular boards, so I don't know if there's any weird things to expect, but from when I bought my parts a couple years ago, general advice is that the *70 boards are really only worth the extra cost if you plan to do OC'ing on the CPU.

As a side note, a brand new chip might not have BIOS support out of the box until the vendors catch up. Just beware and plan for that possibility.

If you want 3 m.2 slots 100% go for the x670e board.

By default on most B__0 boards installing a second m.2 SSD uses all remaining pcie lanes, and possibly even disables some features like sata ports. So installing a 3rd means downgrading your GPU from x16 to x8. X670/e gives you 8 more pcie lanes to fill with all the SSDs you want.

https://www.amd.com/en/products/processors/chipsets/am5.html#specs

Isn't it mostly do you need PCIE 5.0 / NVME 5.0 support:

1. now
2. nope
3. slightly more future proof later?

AMD bringing out surprise 56/700X3D/5600XT recently does give them more brownie pts for extended support for the old AM4 platforms.

Maybe someday there will be a 96/7/800XT3D or something fancy for AM5?

🤔insert moniker naming scheme here.

I'm happy on my B650 board with NVME 4.0 drive and my 7900XTX is still only PCIE 4.0 so eh.