Nanopi M6 vs T6

[specs]

Hi,
One could compare the T6 and the M6 in similar conditions (same network, with monitor active, keyboard attached and nvme). I would use "sudo lspci -vvv" or similar to check if aspm L1 is active for the nvme and "cat /sys/module/pcie_aspm/parameters/policy" to check if it is set to "powersave" for both, since powersaving is a big issue for me.

When using the nvme in powersave mode an RK3588S/M6-system would use around 3W in idle (with a margin for attached devices). When compared to the RK3588/T6 does it consume about the same? Or would the pcie2x1 on the M6 account for at least 1W less consumption than the T6?

Or formulated differently: If I want an efficient system with RK3588(S) and nvme should I choose the T6 or the M6?

[specs]

I have an additional question since the systems need to be used on battery power.
Typically a lead battery provides 12-14V. The M6 would have a USB-PD connection with a 5-20V inut range.

The T6 would have either a strict 12V connection. The Wiki states "Power supply: 5.5*2.1mm DC Jack & 2-Pin 3.5mm pitch connector, 12VDC input." and a little further "Power supply via 5.5*2.1mm DC Jack. 5V~20V, 12V is recommended.".

When the inlet would be 12V I'd need a very expensive stabilized power adapter. If it is only 7-12V I could work with a cheap step-down converter. If the inlet allows 5-20V I could leave out the DC-DC converter completely. Since the specs change between the T6 and T6-LTS I could imagine some differences between the 2.

[specs]

The M6 looks very interesting for some special purposes, especially when a optimum between speed and power efficiency is sought. But has anyone at FriendlyElec ever tried using an M6?
At least now I know why the T6 can be delivered with an optional Wifi M2.E card and the M6 not.