Getting into Neo Geo, have some questions

I'm looking at getting the CMVS from TimeHarvest on AliExpress. The goal is to get a flash cart and then when they come out get new games like Demons of Asteborg DX and Vengeance Hunters. I think I found everything I need but I wanted to ask to make sure everything will work.

- TimeHarvest's stuff comes with Unibios 4.0 from what I've heard. So since Unibios can switch between AES and MVS, it shouldn't matter what carts I get right? Both will work if I switch the setting to match? And I don't need an adapter then if I have Unibios right?

- I'm thinking I want to avoid the 161 in 1 cart because it's missing some games and the weirdness about its power usage. Is there a good reason to get the Neo SD Pro over the Neo SD, other than that only the Pro MVS cart is available for order right now?

- MVS doesn't need or even have a slot for the memory card right? I'm guessing I don't need one, just add more quarters.