This is my detailed test and scoring of the REI Skyward 4 tent, including a comparison to similar tents. If you are considering the REI Skyward 6, then I think you'll still find this video helpful, because the only differences I could find about the 6 person and 4 person versions of this tent are as follows:

1. The 6-person size has 2 additional storage pockets on the inside
2. The 6-person size is wider (as you would expect)

Everything else about the 4P and 6P Skyward appear to be the same.