The technical mechanics are similar, but that seems to be the extent of it.
Apple (silently) changed the "failure mode" of batteries from reducing autonomy to lowering performances. Ars shows their power mode as "Recommended", I would guess the observation is a side-effect of that, with the laptop switching from "charged" to "charging" power mode (lowering components performances to charge faster). I saw no note about that, I'd like a re-do with a laptop configured for "best performances".
Of course Microsoft kinda shot themselves in the foot by limiting power input to 100W and designing a laptop with more peak draw than this.
No; in the SB case, tablet battery is being drained while connected to the AC. This is counterintuitive and undesirable (imagine you have a gaming session, then commute).
Apple (silently) changed the "failure mode" of batteries from reducing autonomy to lowering performances. Ars shows their power mode as "Recommended", I would guess the observation is a side-effect of that, with the laptop switching from "charged" to "charging" power mode (lowering components performances to charge faster). I saw no note about that, I'd like a re-do with a laptop configured for "best performances".
Of course Microsoft kinda shot themselves in the foot by limiting power input to 100W and designing a laptop with more peak draw than this.