The angle of the pole really doesn’t come into play; it’s the height of the ridge of the tent that matters. What typically happens with two people in the Duplex is one sets up with what looks to be good with a good depth to the bathtub. Then two people crawl in with pads and sleeping bags, push away from each other to get more room and the sum of the widths pushes out on the sides of the walls, which then lowers the walls and that’s when the stretching occurs. If two of us are large, we’ll sleep flip-flop from each other, ie, one person’s head is next to the others feet. This takes up less width that shoulder to shoulder sleeping. The Duplex is tight with two people, but doable. Most of my hikes involved just me in the tent, but if the majority involved two people in the tent, I would get the Triplex for increased width.