The answer kinda depends...
The Standard Casita
17'er bed is slightly wider than the standard Scamp
bed (54 vs 48 inches as I recall, assuming a bed extension to fill the space at the front of the table).
Liberty beds of course are extremely wide.
The custom deluxe Scamp
(wood interior) also has a wider bed (54").
Pretty sure they are all a little shorter than standard residential beds. Most max out at about 76". Which is why many with Casita
Libertys say they sleep 'lengthwise' and not 'sideways'.
Course - if you're feeling adventurous - you can always get a beater and build it up into anything you'd like. That's my own personal preference.