Difference between Brief vs Bikini Underwear Women’s underwear comes in an array of endless possibilities right from style to pattern, fit, color, and so many types that it’s quite easy to jumble them up. If you’re not sure which underwear is what, then you’re certainly not alone. While each style has its own name and its own pros and cons, there are small details that make them differ from each other. Here is the difference between briefs and bikini-type underwear and which one will suit your needs the best.