"As far as the CR2 being tougher, please elaborate."
I never said it was tougher. I just said a 10,000mm floor can stand up to more abrasion/wear than a 1200mm floor before it is no longer waterproof.
"Dan said "The double rainbow does the opposite, starting off at 53" wide but narrowing down to about 25". "
This is absolutely incorrect. The DR is 52" wide from front to back and the single Rainbow is 38" front to rear.b>
You're mis-understanding what I said. Yes the DR is 52" wide from front to back, but I'm talking about more than just floor area here. The sidewalls of the Rainbow tents slope inward significantly, so while the floor single Rainbow is 38" wide, the tent is only 18" wide at the roof. Here's a picture to illustrate:
Because the walls lean in, this gives the tent a lot less interior volume than the CR2. This is significant because you need this space if you are going to have two people moving around, sitting up, playing cards etc in the tent. Because the Rainbow narrows so much, you need to be in the center of the tent to sit up. You can't have two sleepers side by side sitting up in their bags in the Rainbow.
The walls of the CR2 do not slope inward, but rather they actually slope outward which gives the tent a lot of interior room. This makes the entire floor area more usable.