The goal appears to be to produce music as fast as you possibly can, without placing any emphasis on quality.
Unlike Dubstep where sub bass is key, Brostep places more emphasis on ratty high frequency samples and oscillators that arent even low frequency. Toss in a few hip hop vocal samples and you are well on your way to being the worlds next big Brostep producer.
Dubstepper - Man, I cant wait to see Mala & Kode 9.
Dubstep "purists", while not happy, only have themselves to blame as they should have realized that the most accesable elements of any genre will always end up being at the center of a new subgenre.
Unforunately these people do not seem to realize that it would be in traditional dubstep's best interest for there to be as many people making poor facsimiles of the "dubstep" genre as there are the "brostep" genre as it would be an indicator that people are actually still interested in the style to which they dedicate their future hearing loss.
Americanized - brostep
UK - Dubstep
Dubstepper - Man, I cant wait to see Mala & Kode 9."
Average Person - man, i love skrillex's new dubstep track.
Skream Fan: Why the hell do people listen to Skrillex? He's just a shitty Brostep artist!
Dubstep Fan: Why the hell are these two bitching to eachother? I'm a real Dubstep fan, and personally, I like both Skrillex and Skream!
The two forms of music both focus on sweeps through very low frequencies of bass and what many like to call "wub" or "womp". Or to the rest of us "What the hell is that noise? How is it at all enjoyable? You can't even dance to it!"