Triathlon Shoes: What are they?

What is the difference between running shoes and triathlon running shoes other than marketing?

Supposedly…

sewn in tongue, no seams… optimized for sockless running, and easy on
breathability/drainage… get moisture out?

and marketing

one velcro strap is easier to do up than two velcro straps + a buckle.

Doubt he’d wanna run in bike shoes.