Here is how these two tents compare on the numbers. The Copper Spur UL3 takes a modest overall edge, led by low weight, but the Telos Evo TR3 has its own case.
| Big Agnes Copper Spur UL3 | Sea to Summit Telos Evo TR3 | |
|---|---|---|
| GearScore | 77✓ | 74 |
| Capacity | 3 | 3 |
| Packed weight | 54.0 oz✓ | 68.3 oz |
| Floor area | 41 sq ft✓ | 39.8 sq ft |
| Space-to-weight | 12.1 /lb✓ | 9.3 /lb |
| Peak height | 43 in | 48.5 in✓ |
| Doors | 2 | 2 |
| Vestibules | 2 | 2 |
| Price | $650 | $600✓ |
| Type | Ultralight | Backpacking |
Highlighted cells mark the better spec: Copper Spur UL3 in blue, Telos Evo TR3 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 Big Agnes Copper Spur UL3 against the Sea to Summit Telos Evo TR3 is a study in priorities. The Copper Spur UL3 wins on low weight and floor space, and the Telos Evo TR3 pushes back on headroom and price.
The Copper Spur UL3 is 14 oz lighter, more floor area (41 vs 39.8 sq ft), and better space-to-weight. The Telos Evo TR3 is taller (48.5 vs 43 in peak) and $50 cheaper. On the default GearScore the Copper Spur UL3 leads 77 to 74.
Pick the Copper Spur UL3 if you care most about low weight and floor space, which makes it the better call for counting grams on long miles. Pick the Telos Evo TR3 if headroom and price matter more to you, or you are focused on comfort and room to move.
The Big Agnes Copper Spur UL3. It is 14 oz lighter than the Telos Evo TR3.
The Big Agnes Copper Spur UL3. It is more floor area (41 vs 39.8 sq ft) than the Telos Evo TR3.
The Big Agnes Copper Spur UL3, 77 to 74 on the default algorithm. You can re-weight the factors to match your trip.
It depends on your priorities. Go with the Copper Spur UL3 for low weight, or the Telos Evo TR3 for headroom. The spec table above shows exactly where each wins.