Here is how these two tents compare on the numbers. Both are solid; the right one depends on the specs you care about most.
| NEMO Dragonfly OSMO 2P | Big Agnes Copper Spur UL2 | |
|---|---|---|
| GearScore | 75✓ | 74 |
| Capacity | 2 | 2 |
| Packed weight | 42.0 oz | 42.0 oz |
| Floor area | 29 sq ft | 29 sq ft |
| Space-to-weight | 11.0 /lb | 11.0 /lb |
| Peak height | 41 in✓ | 40 in |
| Doors | 2 | 2 |
| Vestibules | 2 | 2 |
| Price | $550✓ | $600 |
| Type | Ultralight | Ultralight |
Highlighted cells mark the better spec: Dragonfly OSMO 2P 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 NEMO Dragonfly OSMO 2P against the Big Agnes Copper Spur UL2 is a study in priorities. The Dragonfly OSMO 2P wins on headroom and price, and the Copper Spur UL2 pushes back on value.
The Dragonfly OSMO 2P is taller (41 vs 40 in peak) and $50 cheaper. Their GearScores land within a couple of points (75 vs 74), so neither runs away with it.
Pick the Dragonfly OSMO 2P if you care most about headroom and price, which makes it the better call for comfort and room to move. Pick the Copper Spur UL2 if you would rather save the difference.
The NEMO Dragonfly OSMO 2P. It is taller (41 vs 40 in peak) than the Copper Spur UL2.
The NEMO Dragonfly OSMO 2P. It is $50 cheaper than the Copper Spur UL2.
They are nearly tied at 75 and 74 on the default algorithm, so re-weight the score to your own priorities to break the tie.
It depends on your priorities. Go with the Dragonfly OSMO 2P for headroom, or the Copper Spur UL2 for the price. The spec table above shows exactly where each wins.