Cotopaxi Allpa 35L vs. Fjallraven Raven 20L

The Cotopaxi Allpa 35L by Cotopaxi and the Fjallraven Raven 20L by Fjallraven are two popular carry-on backpacks with distinct features catering to varying needs. Exploring on both the macro level like material and size and the micro level like weight and carrying capacity, reveals key differences. Cotopaxi Allpa's 35L stands tall at 20 inches, stretching 51 inches in depth, and flaunting 30 inches of width. It tips the scale slightly heavier at 1.5 pounds, which can be attributed to its robust 1680D ballistic nylon paneling. Meanwhile, the Fjallraven Raven 20L cranks up the height to 45 inches but sifts down to a depth and width of 21 and 26 inches, respectively, making it lesser space-consuming. Weighing just under the Cotopaxi's 35L at 1.4 pounds, it's crafted from G-1000 HeavyDuty material.

• The Cotopaxi Allpa 35L is larger, but also weighs slightly more (1.5 lbs compared to 1.4 lbs for the Fjallraven Raven 20L).
• The Fjallraven Raven 20L offers considerably less capacity (20 liters compared to 35 liters), but possesses wider compatibility with airlines.
• Both backpacks can accommodate a 15 inch laptop, but the material they are made from differs (1680D ballistic nylon paneling for the Cotopaxi Allpa 35L against G-1000 HeavyDuty for the Fjallraven Raven 20L).

Diving into the specifics of functionality, the Cotopaxi Allpa 35L takes the lead in overall carrying capacity with a capacious 35 liters. Perfect for the bustling traveler, it's earned noteworthy reviews for its practical organization and comfort. It has won hearts with its laundry bag, shoe bag, and water bottle sleeve inclusions, coupled with its comfortable shoulder straps and security-driven rain cover addition. However, it scores slightly lower in airline compatibility, fitting the requirements of 80% of airlines.

Fjallraven Raven 20L, on the other hand, stands slightly behind in terms of spaciousness, offering 20 liters of carrying capacity. Its shining features that have been praised by the reviewers include high-quality craftsmanship, multiple organization options, and surprisingly more holding capacity than meets the eye. Most importantly, this backpack takes the crown for its universal compatibility, fitting every airline's carry-on dimensions.

In summation, both backpacks bring unique benefits to the table. The Cotopaxi Allpa 35L seems a perfect companion for someone looking for versatility, space, and durability, favored by its numerous positive reviews. The Fjallraven Raven 20L, however, earns points for its high-quality make, neat organization, and universal airline compatibility. Choosing between the two would be a matter of personal preference and specificity of needs – both proven to be reliable carry-on companions.