I actually own these (yellow/orange ones). They don't sound anything like Beats. They actually sound better. However, once you turn it up past 65%, they do start to distort a little bit (source being iPhone 5S) but this is without a portable headphone amp (which I am researching for btw).
If you have any questions, feel free to hit me up. Once I get enough posts and privileges, I'll put up a brief review of them from my perspective.
My lineup now in order of favorites is:
Sennheiser PX 100-II
SOL Republic V10
Dre Beats Studio (It was a x-mas gift, I swear)