What's the difference between road bike shoes and tri bike shoes?

What's the difference between road bike shoes and tri bike shoes?

The best road bike shoes and triathlon bike shoes have a lot in common, but a few notable differences set triathlon-specific cycling footwear apart. Triathlon bike shoes boast all the key features of road cycling shoes. They are compatible with the best clipless pedals for triathlon. They also feature a stiff outsole and charming aero-looks. To these, manufacturers add design elements to benefit triathletes. So is it worth splashing out on a pai…