Front-Clip vs Back-Clip Dog Harness: What's the Difference?
Both leash positions have a purpose. Compare how they change leash handling, redirection and everyday use.

Two leash rings on the same harness can look redundant until you actually use them. Their positions change the direction of leash force and therefore how the setup feels to both dog and handler.
Front attachment
A chest attachment can help redirect the front of the dog's body when they move strongly ahead. Some owners find that useful while working on pulling. The trade-off is that the leash can cross the dog's front legs more easily if handling is sloppy or the fit rotates.
Back attachment
A back attachment keeps the leash above the dog and is simple for ordinary walks, sniffing and many outdoor situations. It offers less mechanical redirection when a strong dog drives straight forward.
Dual attachment
A harness with both points gives you options rather than requiring one method for every walk. Some handlers also use a double-ended leash, but that adds handling complexity and should be introduced thoughtfully.
Neither attachment teaches the behaviour
Changing leash position can change management. It does not automatically teach a dog where you want them to walk. If pulling is the problem, pair equipment choices with training rather than repeatedly changing hardware and hoping one configuration solves everything.
Choose for the walk in front of you
There is no prize for using the same attachment every day. Consider your dog, the environment, your handling and the activity. The best option is the one that gives you comfortable, predictable control without compromising fit.
Keep exploring