Re: Difference between 19/20/21
The 190 and the 210 may have been a reference to length at one time I don't know.
A 190 is 20' 5" long without the tire kit.
A 210 is 21' 11" long without the tire kit.
The 210 is also 9 inches wider and you can get a private bathroom.
The bathroon in a 190 is created by opening doors (on mine it's the bathroom door and a cabinet door).