My wife and have probably slept in our old version Haven over 100 nights at this point.
It is not our only shelter, but the one my wife prefers. And since she is not much of a backpacker, we mostly use it for car camping and placed on tent platforms.
As far as the width goes, two 25" wide sleeping pads fit fine, even though the internal floor space is supposed to be 48" total.
Headroom is not an issue. I am 6' tall and have plenty of clearance when sitting up
.
The floor is long enough that we can keep all of our gear inside at the head and/or foot of the inner. No need to store anything in the vestibule, but will do that with muddy shoes and such.
A very tall person should have plenty of room laying down, but may have the bugnet resting on their head sitting up.
Too many similarities and I could be perfectly happy with either, double wall and double door means good ventilation(very important sometimes).
Both may seem difficult to setup at first, but experience changes that as with most tents.