Why do some fifth wheels have angled front ends?

brianosaur wrote:
I thought I read somewhere a while ago the 45 deg angle on the frame had some advantage over the right angle?

The angled ones have a front drop frame providing more storage. This tends to be on more expensive units. The bottom of the Trailer will be closer to the road due to the drop frame front end but this does not cause any issues.

The ones without have a straight frame front to back just like a travel trailer and this results in less front storage.