SIG Sauer and Glock are both prominent firearms manufacturers known for producing handguns, among other firearms. While they share similarities in terms of being popular choices for law enforcement, military, and civilian use, there are some notable differences between them:

1. Design Philosophy: Glock handguns are typically characterized by their polymer frames and simple design with fewer external controls. They often prioritize reliability, durability, and ease of use. On the other hand, SIG Sauer handguns often feature metal frames and a more traditional design with additional controls like manual safeties and decockers. SIG Sauer tends to emphasize craftsmanship, accuracy, and ergonomics.

2. Operating Mechanism: Glocks predominantly use a striker-fired system, where the firing pin is partially cocked by the slide's action and then fully cocked by the trigger pull before firing. SIG Sauer handguns, particularly their classic P-series pistols, often utilize a hammer-fired system, where the hammer is cocked either manually or automatically, and then released by the trigger pull.

3. Trigger: Glocks are known for their consistent trigger pull, typically with a relatively short travel distance and a consistent pull weight from shot to shot. SIG Sauer handguns may have variations in trigger feel depending on the model, with some featuring single-action or double-action triggers, potentially with a longer trigger pull.

4. Ergonomics: SIG Sauer handguns are often praised for their ergonomic designs, with contoured grips and customizable grip panels to fit different hand sizes comfortably. Glock grips are known for their utilitarian design, which some users find less comfortable compared to SIG Sauer or other brands.

5. Aftermarket Support: Glock enjoys a vast aftermarket support network with numerous accessories, parts, and customization options available. While SIG Sauer also has aftermarket support, it may not be as extensive as Glock's.

6. Model Offerings: Both companies offer a wide range of handgun models suitable for various purposes, including concealed carry, duty use, competition shooting, and more. Glock's lineup includes models like the Glock 17, Glock 19, and Glock 26, while SIG Sauer offers models such as the P320, P226, and P365.

7. Price: Generally, Glocks tend to be more affordable than SIG Sauer handguns, although prices can vary depending on the specific model and market conditions.

Ultimately, the choice between SIG Sauer and Glock often comes down to personal preference, intended use, and individual ergonomic preferences. Both manufacturers have loyal followings and produce high-quality firearms with proven track records of reliability and performance.