Hi toddstrawser,
I don’t have any personal experience with any of them but there is more information in post #3 here that can help you compare them based on the type and quality of the materials that they use.
Hopefully some of the members here that have experience with more than one of these will see your post and share their experiences. I don’t know anyone that has posted on the forum that has compared the Leesa mattress to the other two on the forum (and I would be cautious with the Leesa because of the 3 lb memory foam that they use) … but there are a few that have tried both the Casper and the Tuft & Needle here and here and here and here. A forum search on Casper Tuft Needle (you can just click the link) will also bring up all the forum posts that mention both of them.
Phoenix