from what I've read, I find it hard to believe it's the same.... for $59.00
Those viair inflators are supposed to be really good. Used a lot by offroaders. Highly regarded.
Back in my popup days, a lot of the guys over on that forum used to rave about teh masterflo compressors as good ones
I think it was this one
http://www.amazon.com/Master-Flow-MF...9143860&sr=1-2.
Not as good as the viair, but good for the money so I read....
I would guess good for smaller trailer tires, but not so much for motorhome tires.