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 VersaLite still fits your budget or priorities.
| Feathered Friends Lark YF 10 | Western Mountaineering VersaLite | |
|---|---|---|
| GearScore | 83✓ | 65 |
| Comfort rating | 20 °F | 20 °F |
| Weight | 2 lb 1.4 oz | 32.0 oz✓ |
| Warmth-to-weight | 5.3 /100g | 5.5 /100g✓ |
| Packed size | 11.0 L | n/s |
| Fill power | 900 FP✓ | 850 FP |
| Price | $639✓ | $735 |
| Fill | Down | Down |
| Style | Bag | Bag |
| Shape | Mummy | Mummy |
Highlighted cells mark the better spec: Lark YF 10 in blue, VersaLite 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 Western Mountaineering VersaLite is a study in priorities. The Lark YF 10 is the stronger pick on most of the specs that matter, while the VersaLite makes its case on low weight and warmth-to-weight.
The Lark YF 10 is higher fill power (900 vs 850) and $96 cheaper. The VersaLite is 1 oz lighter and stronger on warmth-to-weight. On the default GearScore the Lark YF 10 leads 83 to 65.
Pick the Lark YF 10 if you care most about fill power and price, which makes it the better call for your priorities. Pick the VersaLite if low weight and warmth-to-weight matter more to you, or you are focused on counting grams on long miles.
The Western Mountaineering VersaLite. It is 1 oz lighter than the Lark YF 10.
The Feathered Friends Lark YF 10. It is higher fill power (900 vs 850) than the VersaLite.
The Feathered Friends Lark YF 10, 83 to 65 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 VersaLite if low weight is your priority.