It's 127 x 127 x 508 mm. I think most mini N100 PCs are around that size.
The OrangePi 5 Max board is 89x57mm (it says 1.6mm "thickness" on the spec sheet but I think that is a typo - the ethernet port is more than that)
Add a few mm for a case and it's roughly 2/3 as long and half the width of the A40.
Sometimes easier to acquire, but usually the same price or more expensive.
Not sure how this compares to the OrangePI in terms of performance per watt but it is already pretty far into the area of marginal gains for me at the cost of having to deal with ARM, custom housing, adapters to ensure the wall socket draw to be efficient etc. Having an efficient pico psu power a pi or orange pi is also not cheap.
It has major overheating issues though, the N100 was never meant to be put on such a tiny PCB.