With the titan you sleep on the seat pad and seat back so the bed is a compromise in padding and sculpting as are most RnR beds. With the RIB you sleep on a surface built solely for sleeping, you can spec it with deeper foam if you like it softer or use a Duvalay sleeping bag which is our choice.
Low profile roofs are to some aesthetically pleasing but the canvas, bed board and mattress have to go somewhere when they close, if you don't want it inside the outer shell then they have to go inside hence the loss of headroom.
It's not just when travelling in a seat when headroom is important, if you are camping and weather for example means you don't pop the roof then spending a damp evening sat on a seat with your head tilted to one side having your tea and watching a film is no fun.
It all boils down to how the van gets used in the end though and of course how tall you all are
Good points. Thats one of the reasons I like the Titan RnR bed. In the seat up position you can angle the back so not sat as upright, more like a sofa. Bad side is sleeping on the front of the seats.
I'm 6' as it happens so tallish.