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.

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.

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