Here is how these two backpacks compare on the numbers. The Gorilla 50 takes a modest overall edge, led by low weight, but the Exos 48 has its own case.
| Gossamer Gear Gorilla 50 | Osprey Exos 48 | |
|---|---|---|
| GearScore | 66✓ | 62 |
| Capacity | 50 L | 48 L |
| Weight | 2 lb✓ | 2 lb 12 oz |
| Rated load | 30 lb | 30 lb |
| Fabric denier | 70 D | 100 D✓ |
| Price | $275 | $265✓ |
| Type | Ultralight | Backpacking |
| Frame | Internal | Internal |
Highlighted cells mark the better spec: Gorilla 50 in blue, Exos 48 in amber. A blank spec is never counted as a win. Capacity is shown for context and is not scored, since more volume is a sizing choice rather than better. GearScore is the overall rating (0 to 100); re-weight it on the full backpack comparison. Prices are current MSRP.
The Gossamer Gear Gorilla 50 against the Osprey Exos 48 is a study in priorities. The Gorilla 50 wins on low weight, and the Exos 48 pushes back on durability and price.
The Gorilla 50 is 12 oz lighter. The Exos 48 is tougher fabric (100D vs 70D) and $10 cheaper. On the default GearScore the Gorilla 50 leads 66 to 62.
Pick the Gorilla 50 if you care most about low weight, which makes it the better call for counting grams on long miles. Pick the Exos 48 if durability and price matter more to you, or you are focused on rough ground and hard use.
The Gossamer Gear Gorilla 50. It is 12 oz lighter than the Exos 48.
The Osprey Exos 48. It is tougher fabric (100D vs 70D) than the Gorilla 50.
The Gossamer Gear Gorilla 50, 66 to 62 on the default algorithm. You can re-weight the factors to match your trip.
It depends on your priorities. Go with the Gorilla 50 for low weight, or the Exos 48 for durability. The spec table above shows exactly where each wins.