> less power consuming than a desktop

Not really seeing that in these minis. Either the devices under test haven't been optimized for low power, or their Linux installs have non-optimal configs for low power. My NUC 12 draws less than 4W, measured at the wall, when operating without an attached display and with Wi-Fi but no wired network link. All three of the boxes in the review use at least twice as much power at idle.