Yes, the wide bodies are fatter than Uhual or "Older" Burros.
Here are the wide body specs. (Outside dimensions)
17 foot Burro travel trailer
Length - 17 feet 8 inches
Height - 7 feet 10 inches
Width - 7 feet 6 inches
Dry
Weight - 1800 lbs.
Hitch
Weight - 125 lbs.
That
weight is not realistic.. it's without the options and like every trailer.. take the published weights with a grain of salt.
I wish I could remember the width of my "Slim Body" (Be quiet boyz!) I am guessing it's 5 foot six based on my height (5'1") and the fact that when I was laying down inside I was almost wall to wall.
Someone that actually still HAS thiers may be kind enough to measure for you tho.