Here is how these two sleeping bags compare on the numbers. On the data the Lark YF 10 is the stronger all-round pick, and the question is whether the Neutrino 600 still fits your budget or priorities.
| Feathered Friends Lark YF 10 | Rab Neutrino 600 | |
|---|---|---|
| GearScore | 83✓ | 64 |
| Comfort rating | 20 °F | 20 °F |
| Weight | 2 lb 1.4 oz✓ | 2 lb 4.3 oz |
| Warmth-to-weight | 5.3 /100g✓ | 4.9 /100g |
| Packed size | 11.0 L | n/s |
| Fill power | 900 FP✓ | 800 FP |
| Price | $639 | $580✓ |
| Fill | Down | Down |
| Style | Bag | Bag |
| Shape | Mummy | Mummy |
Highlighted cells mark the better spec: Lark YF 10 in blue, Neutrino 600 in amber. A blank spec is never counted as a win. A lower comfort rating in °F means a warmer bag, so the warmer bag takes that row. GearScore is the overall rating (0 to 100); re-weight it on the full bag comparison. Prices are current MSRP.
The Feathered Friends Lark YF 10 against the Rab Neutrino 600 is a study in priorities. The Lark YF 10 is the stronger pick on most of the specs that matter, while the Neutrino 600 makes its case on price.
The Lark YF 10 is 3 oz lighter, stronger on warmth-to-weight, and higher fill power (900 vs 800). The Neutrino 600 is $59 cheaper. On the default GearScore the Lark YF 10 leads 83 to 64.
Pick the Lark YF 10 if you care most about low weight and warmth-to-weight, which makes it the better call for counting grams on long miles. Pick the Neutrino 600 if price matter more to you, or you are focused on getting the most for your money.
The Feathered Friends Lark YF 10. It is 3 oz lighter than the Neutrino 600.
The Feathered Friends Lark YF 10. It is stronger on warmth-to-weight than the Neutrino 600.
The Feathered Friends Lark YF 10, 83 to 64 on the default algorithm. You can re-weight the factors to match your trip.
The Lark YF 10 is the stronger all-round pick here. Choose the Neutrino 600 if price is your priority.