Greenroom136 Rainmaker vs. Ortlieb Velocity

Our first contender, the Greenroom136 Rainmaker, nestles itself comfortably into the world of reliable, robust carry-ons. Measuring an impressive 40 inches tall, 28 inches wide, and boasting a 21-inch depth, it certainly has the capacity to carry the essentials and then some. Weighing in at 1.7 pounds, it has a sturdy feel, without weighing you down excessively. A storage capacity of 22 liters makes this bag a commendable contender for the seasoned traveler. Touted as being compatible with 100% of airlines, the compatibility concern flies out the window. Constructed with 1000D Cordura, the durability of this bag is beyond construable doubt and is ready to brave just about any weather. For the digital nomad, the bag accommodates a 15-inch laptop with absolute ease.

Our second in line is the Ortlieb Velocity. Compared to its adversary, it is shorter, wider and deeper, measuring in at 16 inches tall, 30 inches wide, and a spacious 50-inch depth. It's lighter, too, weighing only 0.88 pounds, and this lightweight nature certainly contributes to its appeal. It doesn't lag behind in capacity either, providing slightly more room to carry at 23 liters. Equipped to accommodate a 15-inch laptop, the Ortlieb Velocity matches up perfectly in this sphere. However, it's not all rosy, with a compatibility rating of 82% with airlines, you might need to be a tad bit careful with your travel plans. Constructed with PD620, PS620C, it doesn't match the established robustness of 1000D Cordura but nonetheless remains fairly sturdy and resistant.

Comparison Bullet Points:

• Dimensions: Rainmaker (40x28x21 inches) vs. Velocity (16x30x50 inches)
• Weight: Rainmaker (1.7 pounds) vs. Velocity (0.88 pounds)
• Storage: Rainmaker (22 liters) vs. Velocity (23 liters)
• Airline Compatibility: Rainmaker (100%) vs. Velocity (82%)
• Material Construction: Rainmaker (1000D Cordura) vs. Velocity (PD620, PS620C)
• Laptop Compartment: Both can fit a 15-inch laptop.

Acknowledging the pros and cons of both carry-ons, reviewers of the Rainmaker commend its functionality, customizability, comfort, and durability. It's a no-frills bag that does exactly what it sets out to do, namely keep your belongings organized and safe, even in the toughest of weather conditions.

On the flip side of the coin, The Ortlieb Velocity is applauded for its smart and sleek design, as well as being lightweight, durable, and extremely comfortable to use. It's a bag that echoes convenience throughout its design, and although it may not be as robust as its contender, it does not fall short in its ability to protect your belongings. Don't forget it also provides slighty more space! Which backpack would Hemingway opt for? Well, that's left to one's own discretion.