Running shoes will focus on function with support, breathability, moisture wicking, and breathability. They aren’t necessarily the most comfy shoes to walk in because your gait is different walking vs running. The front of the shoe will have more cushion to help support you pushing off in your running stride.

Sneakers are meant to be more stylish everyday shoe. They focus more on form over function.

You’re right there can be overlap. Adidas ultra boosts are stylish enough to be worn every day and are technically a running shoe. Not a lot of runners use them but they do offer the function of a running shoe.

That’s the sneaker market, not running shoes