[Equipment] Difference between ResMed p/ns?

[Hrapovik]

Hi all, a noob here.
I've found a used AirCurve ASV online. The seller provided a picture of the backplate showing p/n 37092.
Googling up this p/n I've come across the attached document.
Looks like 37092 is indeed an AirCurve ASV. But so are 37042, 37043, 37044, 37215, 37216, 37229, 37230, 37291, 37410, 37411, 37384, 37144. 
Does anyone know the difference between them all?
Are these all different kinds of ASV? 

Thanks!

P.S. Why does ResMed have so many p/ns for the same model? Look at the VAuto - holy cow!

[Crimson Nape]

I don't have a specific answer, but there can be different model numbers for the country of distribution for the same model. What is the serial number?

- Red

[Hrapovik]

I don't have a specific answer, but there can be different model numbers for the country of distribution for the same model.  What is the serial number?

- Red

Thanks!
The s/n is 23202910901
Made in Singapore in 2020, right?

[Hrapovik]

Well, I went ahead and bought it.
$700 for a Resmed AirCurve 10 ASV with just 4,000 hours on it was too good to pass on. I'll report if p/n 37092 doesn't work as an ASV should. In most online stores, AirCurve 10 ASVs are sold as p/n 37215 (regular tube) or 37216 (heated tube).

[Hrapovik]

The machine works