The Banana Pi BPI-M7 single board computer is equipped with up to 32GB RAM and 128GB eMMC flash, and features an M.2 2280 socket for one NVMe SSD, three display interfaces (HDMI, USB-C, MIPI DSI), two camera connectors, dual 2.5GbE, WiFi 6 and Bluetooth 5.2, a few USB ports, and a 40-pin GPIO header for expansion.
The max Power consumption often does not matter on devices that run 24/7 more important is the idle powet consumption. Here are SBCs and ARM Chips in generell way better.
I had my Pi 3B+ down to under 5W on idle having various services running. I can not speek for newer Pi versions but i would estimate them still lower then 8W on idle. That is really hard to beat with an normal PC. Maybe the Mini PC with newer Mobile or integrated CPUs are getting in this region.
Not quite sure where you got the 37W for the HP Mini.
Check this out: https://lemmy.world/comment/5503906