I have a third of an answer via the Copper Spur UL1 vs. Nemo Hornet 1. They are fairly comparable as LW one-man tents with side entry. The Copper Spur canopy is free-standing while the Hornet is not, and the Hornet is lighter and tighter quarters.

Does any of this extrapolate to your options? Perhaps not but I can say the CS UL1 has been a great shelter. Even got rained on for the first time last week, and the fly-vestibule design worked great. Most nights I skip the fly and enjoy the night sky.

Nemo in general makes very good products but is in fewer stores than Big Agnes.

Cheers,
_________________________
--Rick