A difference that seems to have evolved between E-Series, Transit, and Sprinter cutaway chassis are their type of motorhome application.
Major manufacturers, including Thor, seem to be using Transit more to build B+ motorhomes. A few manufacturers discontinued their compact Class C on Transit chassis in last year or two. Whether that’s by regulation or lack of demand I have no idea. Would be good to know if there’s a technical reason.
Similarly, since new Sprinter chassis came out, most major manufacturers are building Class C on them instead of B+. Some make a pseudo B+ an option in that over-cab bed area is used for entertainment center, but the outer shell appears the same. The front caps on these are not as aero as on traditional B+.
The old E-Series is still used for both Class B+ and C, with Cs being more common than B+. However, some B+ are fairly large at over 30 feet in length.
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