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Brooks Women's Addiction GTS 15 Supportive Running vs Under Armour Women's Charged Assert 9, Black/White, 8.5 US

Updated August 2026 — Brooks Women's Addiction GTS 15 Supportive Running leads on comfort and support.

The Brooks Women's Addiction GTS 15 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 beginners.

Why Brooks Women's Addiction GTS 15 Supportive Running is better

Support Technology

Brooks features GuideRails support technology.

Cushioning

Brooks uses adaptive BioMoGo DNA cushioning.

Fit

Brooks provides a roomy fit for unique foot shapes.

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

Price

Under Armour is significantly cheaper.

Weight

Under Armour is lighter and more suitable for casual runners.

Style

Under Armour offers a classic Black/White design.

Overall score

Brooks Women's Addiction GTS 15 Supportive Running
85
Under Armour Women's Charged Assert 9, Black/White, 8.5 US
65

Specifications

SpecBrooks Women's Addiction GTS 15 Supportive RunningUnder Armour Women's Charged Assert 9, Black/White, 8.5 US
BrandBrooksUnder Armour
ModelAddiction GTS 15Charged Assert 9
CushioningBioMoGo DNACharged Cushioning
SupportGuideRailsReinforced Overlays
FitRoomyStandard

Dimension comparison

Brooks Women's Addiction GTS 15 Supportive RunningUnder Armour Women's Charged Assert 9, Black/White, 8.5 US

Price Comparison

When it comes to pricing, the Under Armour Women's Charged Assert 9 is significantly more affordable than the Brooks Women's Addiction GTS 15. Priced at $57.95, the Under Armour shoe costs about 59% less than the Brooks shoe, which retails at $139.95. This substantial price difference makes the Under Armour option appealing for budget-conscious buyers or those who are just starting their running journey. Additionally, the bestseller rank of the Under Armour shoe at 2002 indicates its popularity, suggesting that many consumers find it to be a valuable purchase at this lower price point.

Comfort and Fit

In terms of comfort, the Brooks Women's Addiction GTS 15 is designed with a roomy fit that accommodates various foot shapes, making it particularly beneficial for runners with unique needs. Its BioMoGo DNA cushioning adapts to the wearer's stride, which helps protect joints by reducing impact. On the other hand, the Under Armour Women's Charged Assert 9 features a plush step-in feel with foam padding around the ankle for a comfortable fit right out of the box. While both shoes emphasize comfort, the Brooks shoe’s roominess may be especially advantageous for those who require orthotic support or have higher volume feet.

Support Technology

Support is a critical factor for many runners, and here the Brooks Women's Addiction GTS 15 excels with its innovative GuideRails support technology. This feature reduces excess joint movement, focusing on stabilizing the knees, a common injury-prone area for runners. The Under Armour Women's Charged Assert 9 also offers midfoot support through reinforced overlays, which improves stability during runs. However, the specialized support technology in the Brooks shoe may provide an edge for those who need more comprehensive support throughout their runs.

Breathability

Both the Brooks Women's Addiction GTS 15 and the Under Armour Women's Charged Assert 9 provide breathable uppers, but they achieve this in different ways. The Brooks shoe utilizes a combination of 3D Fit Print and engineered Air Mesh for a blend of stretch and structure, ensuring comfort during long runs. Conversely, the Under Armour shoe features a lightweight mesh upper that enhances airflow, keeping feet cooler during workouts. While both options are designed to promote breathability, the Brooks shoe’s structure might offer a more tailored fit, which can be crucial for longer distances.

Cushioning

Cushioning is paramount for a comfortable running experience, and the Brooks Women's Addiction GTS 15 incorporates BioMoGo DNA, which adapts to individual stride, weight, and speed. This responsive cushioning is designed to protect the joints effectively. In comparison, the Under Armour Women's Charged Assert 9 features a Charged Cushioning midsole that delivers balanced impact protection, making it suitable for newer runners. While both shoes provide cushioning benefits, the Brooks shoe’s adaptive technology may offer a more personalized experience for seasoned runners.

Durability

When considering durability, both products are designed to withstand the rigors of running, but they approach it differently. The Brooks Women's Addiction GTS 15 is built with a focus on long-term support and comfort, making it a solid investment for serious runners. The Under Armour Women's Charged Assert 9 utilizes a tire-inspired outsole pattern that enhances traction and flexibility, which is essential for varied running surfaces. While the exact longevity of each shoe can depend on usage, the Brooks brand generally emphasizes durability through their high-quality construction.

Style and Aesthetics

In terms of style, the Brooks Women's Addiction GTS 15 comes in a soft color palette of Oyster/Peacoat/Lilac Rose, appealing to those who prefer a more muted aesthetic. The Under Armour Women's Charged Assert 9, with its sleek Black/White design, offers a more classic and versatile look. Personal preference will largely dictate which style is more appealing, but both shoes offer attractive options that cater to different tastes.

Which should you buy?

Ultimately, the choice between the Brooks Women's Addiction GTS 15 and the Under Armour Women's Charged Assert 9 depends on your specific needs and budget. If you prioritize advanced support technology and a roomy fit for unique foot shapes, the Brooks shoe may be the better investment despite its higher price. However, if you are looking for an affordable option that still provides comfort and adequate support for everyday running, the Under Armour shoe is an excellent choice at about 59% less than its competitor.