Compare the documented 2 person and 2 person versions. This is a source-based specification comparison, not a field test or a current price ranking.
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The useful difference
Start with minimum and maximum floor dimensions, then compare the same weight definition. A two-person label alone cannot prove two wide pads fit. Tent weight rows should be read only when both brands report the same packed or minimum basis.
Exact versions compared
Big Agnes Copper Spur UL2 — 2 person and NEMO Dagger OSMO — 2 person. Other sizes may change the result.
Specifications side by side
| Metric | Big Agnes Copper Spur UL2 — 2 person | NEMO Dagger OSMO — 2 person |
|---|---|---|
| Claimed capacity | 2 | 2 |
| Minimum weight | 2.60 lb (1,180 g) | 3.33 lb (1,510 g) |
| Packed weight | 3.02 lb (1,370 g) | 3.97 lb (1,800 g) |
| Floor length | 88.0 in (224 cm) | 88.0 in (224 cm) |
| Narrowest floor width | 42.0 in (107 cm) | 50.0 in (127 cm) |
| Widest floor width | 52.0 in (132 cm) | 50.0 in (127 cm) |
| Floor area | 29.0 sq ft (2.69 m²) | 30.6 sq ft (2.84 m²) |
| Peak height | 40.0 in (102 cm) | 43.0 in (109 cm) |
| Doors | 2 | 2 |
| Vestibules | 2 | 2 |
“Not verified” is an unknown value. It is never zero or proof that a feature is absent.
Search the exact model names on Amazon
These are paid search-result links for the model names above. Confirm the variant on Amazon before ordering.
Search for Big Agnes Copper Spur UL2 Tangelo and check the exact size, revision and seller details before ordering.
(paid link)Search this model on AmazonAmazon search results may include different variants or sellers. No price or stock is verified here.Search for NEMO Dagger OSMO 2P and check the exact size, revision and seller details before ordering.
(paid link)Search this model on AmazonAmazon search results may include different variants or sellers. No price or stock is verified here.How to choose
Start with minimum and maximum floor dimensions, then compare the same weight definition. A two-person label alone cannot prove two wide pads fit. Tent weight rows should be read only when both brands report the same packed or minimum basis.
Open each record to inspect the source for the exact figure and its revision notes: Big Agnes Copper Spur UL2 — 2 person; NEMO Dagger OSMO — 2 person. The comparison has 10 shared numerical fields. Consider your shelter floor, sleep position and expected conditions with the sleep system builder.
What this comparison cannot establish
Neither listing verifies live inventory, price, independent durability, noise, waterproof performance in a storm, or comfort for every sleeper. Where a manufacturer gives conflicting figures, the product record preserves the discrepancy and may omit a normalized number.
Sources and further reading
Source pages and product listings can change. Specifications were assembled from the supplied dataset as of October 30, 2026; current availability is not guaranteed.
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