βIn this case the Duo Mid XL is listed at 65 sq feet plus, the total footprint of the TT Aeon is about 30 sq feet.β
Also in this case, you are comparing a 1P shelter to a 2P shelter. :)
The only reason the OP was looking at a 2 person shelter is because :
“it seems like the only way to get a tent with enough headroom laying on a 2-3 inch airmatress with a 20 degree quilt and not hit the walls was something bigger than a single person “.Β Β
Some suggested that he would fit inside the single person TT Aeon .