Metalcore is a blend of metal and hardcore music. Metalcore includes breakdowns and intricatley played riffs and chords. The vocalists usually sing the verses in line and to the beat of the music and the riffs played by the band. It's not that hard to distinguish different genres of metal and hardcore and emo because of the way that the band plays their instruments, stage presence, and their sound in their screams.....being that I personally interested in hardcore and metalcore the most, I believe that I gave an accurate description.
metal-lamb of god
metalcore-a dozen furies, Zao, bleeding through
post-hardcore-as i lay dying
goth metal-cradle of filth