I have a couple of both. For me, the heavyweight core , is almost too much. I ski in it mostly. The R1 seems a bit lighter , less warm , but maybe it's cause it's pretty old.

Lightweight Tipi Tents and Hunting Tents https://seekoutside.com/tipis-and-hot-tents/
Backpacks for backpack hunting https://seekoutside.com/hunting-backpacks/
Hot Tent Systemshttps://seekoutside.com/hot-tent-combos/