They are the same in all respects except All biofeedback Scan uses HRV and All Full System Scan uses BPM.
ALL Biofeedback Scan - DB also seeks 10 hits as opposed to the 20 programmed in ALL Full System Scan - DB. If you read the Notes for the first one, you'll see it's part of the Morgellons and Lyme Protocol. This repeats everything twice in each preset, so a full scan would have taken a two-hour bite out of each one, and increased the time required to complete the protocol. As long as users scan when they should, the scan will do a very effective job because the hits are listed in order of responsiveness to the input sweep.
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