This is gross over-exaggeration. IMHO 95% of the world wont be able to tell the diff between m50s and the Studios. And the difference between them is not night and day. My girlfriend cannot tell the difference between the Sennheiser HD800s from my Edition 8.. or her Sony MDR XB700s. Does that mean she is deaf? Not at all. It takes alotta experience and 'training' to pick the difference up, differences that might initially appear very subtle. These differences are harder to tell with short 15min auditions. To 95% of the worlds population, they don't really care if there is any difference anyway. M50s are a cheap looking, boring, industrial headphone, whilst Beats look cool, street smart, are popular and according to a famous rapper, you're not hearing everything until you've heard his headphones.
True, and the M50's require an amp to sound at it's fullest as well.