Which is better for standing or walking all day?

The Kaptir 3.0. Its Cloudfoam midsole and knit upper are softer and lighter, which most owners find easier on feet over long days. The Streettalk's rubber cupsole is firmer.

The Streettalk. Its leather-look upper and rubber cupsole keep their shape, while the Kaptir's knit upper and soft foam tend to stretch and compress with heavy wear.

Is the Kaptir 3.0 good for actual running?

No. It is sold as a running shoe but is built for casual wear, with a soft foam midsole and no stability features. Use a dedicated running shoe for training.

Does the Streettalk fit true to size?

It runs true to size for most people and comes in medium width only. If you have wide feet, the Kaptir 3.0's wide fit is the safer choice.

Which looks better with jeans?

The Streettalk. Its shell toe and leather-look upper read as a classic street sneaker. The Kaptir's knit upper is sportier and more casual.

Is stepping up to the Kaptir worth it?

If comfort and breathability matter most, yes. If you want a sturdier shoe that keeps its shape and a retro look, the Streettalk is the better pick.

adidas Streettalk vs Adidas Kaptir 3.0

Buy the Streettalk if you want a retro leather-look sneaker with a shell toe and a firm rubber cupsole that holds its shape. Buy the Kaptir 3.0 if comfort matters more: its knit upper and Cloudfoam midsole are softer and lighter, and it has far more owner ratings. The Streettalk wins on build and style; the Kaptir wins on cushioning and breathability.

Choose the Streettalk if you want a classic shell-toe look in leather or synthetic leather that wears well with jeans and casual outfits.
Choose the Kaptir 3.0 if you want a light, breathable knit sneaker with soft Cloudfoam cushioning for all-day walking.

Prices

adidas Streettalk: $20.00 at ShopSimon (checked today)
Adidas Kaptir 3.0: $34.95 at Amazon (last seen Nov 8)
Difference: the adidas Streettalk is $14.95 cheaper than the Adidas Kaptir 3.0 at the latest prices (Nov 8 and Nov 9)