A close look at two tents buyers cross-shop. They score within a hair of each other, so it comes down to the details below.
| Big Agnes Copper Spur UL3 | NEMO Dragonfly OSMO 3P | |
|---|---|---|
| GearScore | 77✓ | 77 |
| Capacity | 3 | 3 |
| Packed weight | 54.0 oz | 54.0 oz |
| Floor area | 41 sq ft | 41.2 sq ft✓ |
| Space-to-weight | 12.1 /lb | 12.2 /lb✓ |
| Peak height | 43 in✓ | 42 in |
| Doors | 2 | 2 |
| Vestibules | 2 | 2 |
| Price | $650 | $620✓ |
| Type | Ultralight | Ultralight |
Highlighted cells mark the better spec: Copper Spur UL3 in blue, Dragonfly OSMO 3P 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.
Put the Big Agnes Copper Spur UL3 next to the NEMO Dragonfly OSMO 3P and the trade-offs are clear. They are close enough that this really is about which handful of specs you weight most.
The Copper Spur UL3 is taller (43 vs 42 in peak). The Dragonfly OSMO 3P is more floor area (41.2 vs 41 sq ft), better space-to-weight, and $30 cheaper. Their GearScores land within a couple of points (77 vs 77), so neither runs away with it.
Pick the Copper Spur UL3 if you care most about headroom, which makes it the better call for comfort and room to move. Pick the Dragonfly OSMO 3P if floor space and space-to-weight matter more to you, or you are focused on comfort and room to move.
The NEMO Dragonfly OSMO 3P. It is more floor area (41.2 vs 41 sq ft) than the Copper Spur UL3.
The Big Agnes Copper Spur UL3. It is taller (43 vs 42 in peak) than the Dragonfly OSMO 3P.
They are nearly tied at 77 and 77 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 Copper Spur UL3 for headroom, or the Dragonfly OSMO 3P for floor space. The spec table above shows exactly where each wins.