This has probably been brought up a lot but what is the difference? Other than the price, which UAS runs way cheaper. UAS sounds louder than the Air Runner but maybe I was just watching poorly edited footage.

If I must, then I'll go with UAS, honestly I could do a lot with the difference I'd save but this is why I'm here to ask the questions and to hear opinions.

I've googled, I've searched and also did a page-by-page search for threads and no such luck. If you don't wanna help then just point me to the right link and I'll be on my way thanks.