Mvac CV switchable between Series and Parallel

[blackheart]

So I came across this central vac unit yesterday that can be run as either a parallel or series unit depending on where you attach the motor pod.
Parallel motors are supposed to give higher airflow while a series setup has higher suction I've wondered which setup is better, it seems like the industry, in general, prefers parallel units as there seems to be far more of those available.
It's called the Mvac HD7525

 

[panasonicvac]

That's the sister model of the CycloVac 7525, made by the same company.

http://www.cyclovac.us/vacuum/vacuums-units/residential/extraperformance/central-vacuum-7525

 

[blackheart]

Oooooh

Interesting it seems like there's a lot of private labeling in the CV industry so it's not shocking but that is interesting to know who it's made by and seeing the sister to it