Only had one camper ; way back in the day.
JMHO. the added height may be ok for internal head room , but could cost you in added wind resistance ( fuel mileage ) and cornering stability.
I would check that all models your looking at, are measuring from the same point to point. Cause 14" sounds like a bunch.
See if you can check a spec for floor , of the truck ,to top of the camper; that may be better for comparison.