If you are determined to buy from them instead of your own hardware the One should easily be plenty. However if you look at the specs it says:

(Pure) Operating System: StartOS (with Coreboot firmware and Intel® Management Engine disabled)

(One) Operating System: StartOS

So being a rather stupid person i opted to spend more sats on the thing with the things that are disabled, despite it being absolute overkill for what i’m doing with it (basically just validating 🤣)