Penthouse VS Colorado Camper Van
CCV will put a pop top on about anything, no matter how old. If someone makes a Fiberglass top for it, he can make it a pop top (usually). Also, he has used several different tops for the Ford vans.
A CCV top will give you about 8' of standing room with the top up. Cost wise they are about the same I think. Also, CCV does an electric lift only vs the manual/spring option of the Sportsmobile top. I am a very satisfied CCV but some have had some issues, so I would recommend planning carefully and getting everything in writing if you go with CCV.
Sportsmobile, being an older established company gives you multiple locations to have the work done, also very important if you ever need service done.
Where are you located? Perhaps one of us with one or the other could show you in person so you can narrow down what you want.
Currently vanless. Weird.