Both are fantastic tents for the honest price that we are selling them at. The Zion tent has a slightly larger footprint and quite a bit more internal volume due to the pole design with the vertical side walls and horizontal crossbar at the top. This is a great 2 person tent because it actually provides plenty of room for two adults. The Zion tent's fly, floor, and footprint are built with ripstop polyester. The Yosemite tent has the same footprint, but the floor and fly are not built with ripstop fabric. The Yosemite tent is your standard 2 pole cross design. It is a fantastic tent as well, but a much more plain design and therefore the lower price. Both tents have internal pockets, a removable gear loft, 2 doors, 2 vestibules, and can be set up in ultralight designs. Both the Zion and Yosemite tents can be set up with just the fly and poles or fly, poles, and footprint for an extremely low weight backpacker that is trying to save ounces on every piece of equipment!