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Brooks Women’s Ariel GTS 24 Supportive Running & vs Under Armour Women's Charged Assert 9, Black/White, 8.5 US

Updated August 2026 — Brooks Women’s Ariel GTS 24 Supportive Running & wins on support and comfort, Under Armour Women's Charged Assert 9, Black/White, 8.5 US wins on breathability.

The Brooks Women’s Ariel GTS 24 offers superior support and comfort, making it ideal for serious runners, while the Under Armour Women’s Charged Assert 9 is a budget-friendly option for casual users.

Why Brooks Women’s Ariel GTS 24 Supportive Running & is better

Support

Brooks provides maximum support with GuideRails technology.

Cushioning

Brooks features nitrogen-infused DNA Loft v3 cushioning.

Certification

Brooks is certified as a PDAC A5500 Diabetic shoe.

Why Under Armour Women's Charged Assert 9, Black/White, 8.5 US is better

Price

Under Armour is significantly cheaper at $57.95.

Breathability

Under Armour has a lightweight mesh upper for better airflow.

Weight

Under Armour is lighter, making it easier for casual use.

Overall score

Brooks Women’s Ariel GTS 24 Supportive Running &
85
Under Armour Women's Charged Assert 9, Black/White, 8.5 US
70

Specifications

SpecBrooks Women’s Ariel GTS 24 Supportive Running &Under Armour Women's Charged Assert 9, Black/White, 8.5 US
BrandBrooksUnder Armour
ModelAriel GTS 24Charged Assert 9
Price$119.95$57.95
Sales Rank36162002
Cushion TypeDNA Loft v3Charged Cushioning

Dimension comparison

Brooks Women’s Ariel GTS 24 Supportive Running &Under Armour Women's Charged Assert 9, Black/White, 8.5 US

Overview of the Brooks Women’s Ariel GTS 24

The Brooks Women’s Ariel GTS 24 is designed for maximum support and comfort, making it a popular choice among runners and walkers alike. Priced at $119.95, this model stands out with its nitrogen-infused DNA Loft v3 cushioning and the GuideRails technology that promotes a natural motion path. This combination is particularly beneficial for those seeking stability and support during their activities. The Ariel GTS 24 is certified as a PDAC A5500 Diabetic shoe and holds the APMA Seal of Acceptance, highlighting its suitability for a wide range of users.

Overview of the Under Armour Women’s Charged Assert 9

The Under Armour Women’s Charged Assert 9 is a more budget-friendly option, retailing at $57.95. This shoe features a breathable upper made from lightweight mesh, which enhances airflow and keeps feet comfortable. With a charged midsole that delivers balanced impact protection, it’s particularly appealing for new runners or those engaged in light training. The Assert 9’s reinforced overlays provide midfoot support, ensuring stability during runs or walks, which can be crucial for maintaining comfort over longer distances.

Pricing Comparison

When it comes to pricing, the Brooks Women’s Ariel GTS 24 is considerably more expensive than the Under Armour Women’s Charged Assert 9. At $119.95, the Brooks model is about 107% pricier than the Assert 9, which is priced at $57.95. This significant price difference may be a determining factor for budget-conscious buyers. However, the higher price of the Brooks shoe reflects its advanced features aimed at providing maximum support and comfort, which may justify the investment for serious runners or those with specific foot care needs.

Comfort and Fit

The Brooks Women’s Ariel GTS 24 offers exceptional comfort, primarily due to its nitrogen-infused DNA Loft v3 cushioning, which adapts to the user’s unique stride. Its engineered upper provides a generous fit that enhances the overall comfort experience. In contrast, the Under Armour Women’s Charged Assert 9 also emphasizes comfort but does so through a plush step-in feel, thanks to foam padding around the ankle and a molded liner. While both shoes prioritize comfort, the Brooks model may appeal more to those who require additional support, especially during longer runs or walks.

Stability Features

Stability is a crucial aspect for runners, and the Brooks Women’s Ariel GTS 24 excels in this category with its GuideRails holistic support system. This innovative technology helps to limit excess joint movement, keeping the body in its natural motion path. Conversely, the Under Armour Women’s Charged Assert 9 includes reinforced overlays that improve midfoot stability, but it may not offer the same level of support as the Brooks model. For individuals prone to overpronation or those requiring extra stability, the Brooks shoe may be the more appropriate choice.

Breathability and Temperature Control

In terms of breathability, the Under Armour Women’s Charged Assert 9 has a distinct advantage with its lightweight mesh upper that enhances airflow, keeping feet cool during warm-weather activities. This characteristic makes it suitable for users who prioritize breathability during their workouts. The Brooks Women’s Ariel GTS 24, while also comfortable, does not specifically highlight breathability features in its description. For those who tend to run in hotter climates, the Under Armour model may provide a more pleasant experience.

Performance on Different Surfaces

Both shoes are designed for a variety of activities, but their performance can vary based on the intended use. The Brooks Women’s Ariel GTS 24 is tailored for serious runners, providing a high level of support and cushioning that is ideal for longer distances on varied terrains. Its sales rank of 3,616 reflects its popularity among dedicated athletes. On the other hand, the Under Armour Women’s Charged Assert 9, with a sales rank of 2,002, caters more to casual runners and walkers, offering a comfortable experience for lighter training sessions or everyday use.

Which should you buy?

Deciding between the Brooks Women’s Ariel GTS 24 and the Under Armour Women’s Charged Assert 9 ultimately comes down to individual needs and budget. If you are a serious runner looking for maximum support and comfort, the Brooks model is worth the investment at $119.95. Its stability features and certification as a diabetic shoe provide added assurance for those requiring specialized support. However, if you are a casual runner or walker seeking a budget-friendly, comfortable option, the Under Armour model at $57.95 offers great value while still delivering essential performance features.