Here is how these two tents compare on the numbers. The StratoSpire 2 Li takes a modest overall edge, led by low weight, but the Copper Spur UL2 has its own case.
| Tarptent StratoSpire 2 Li | Big Agnes Copper Spur UL2 | |
|---|---|---|
| GearScore | 80✓ | 74 |
| Capacity | 2 | 2 |
| Packed weight | 29.7 oz✓ | 42.0 oz |
| Floor area | 29.6 sq ft✓ | 29 sq ft |
| Space-to-weight | 15.9 /lb✓ | 11.0 /lb |
| Peak height | 44 in✓ | 40 in |
| Doors | 2 | 2 |
| Vestibules | 2 | 2 |
| Price | $629 | $600✓ |
| Type | Ultralight | Ultralight |
Highlighted cells mark the better spec: StratoSpire 2 Li in blue, Copper Spur UL2 in amber. A blank spec is never counted as a win. GearScore is the overall rating (0 to 100); re-weight it on the full tent comparison. Prices are current MSRP.
The Tarptent StratoSpire 2 Li against the Big Agnes Copper Spur UL2 is a study in priorities. The StratoSpire 2 Li wins on low weight and floor space, and the Copper Spur UL2 pushes back on price.
The StratoSpire 2 Li is 12 oz lighter, more floor area (29.6 vs 29 sq ft), and better space-to-weight. The Copper Spur UL2 is $29 cheaper. On the default GearScore the StratoSpire 2 Li leads 80 to 74.
Pick the StratoSpire 2 Li if you care most about low weight and floor space, which makes it the better call for counting grams on long miles. Pick the Copper Spur UL2 if price matter more to you, or you are focused on getting the most for your money.
The Tarptent StratoSpire 2 Li. It is 12 oz lighter than the Copper Spur UL2.
The Tarptent StratoSpire 2 Li. It is more floor area (29.6 vs 29 sq ft) than the Copper Spur UL2.
The Tarptent StratoSpire 2 Li, 80 to 74 on the default algorithm. You can re-weight the factors to match your trip.
It depends on your priorities. Go with the StratoSpire 2 Li for low weight, or the Copper Spur UL2 for price. The spec table above shows exactly where each wins.