Core and grind are two different styles in rock music, which can be distinguished from the following aspects:

1. Origin and evolution: Core music is a subgenre of hardcore After punk, a music style was born from the continuous creation and fusion of different music styles and hardcore elements by musicians from all over the world. It contains many subcategories, such as post-core, electronic core, avant-garde core, emo core, death core, metal core, etc. Grindcore is mainly characterized by strong guitar riffs and chaotic rhythms.

2. Music elements: The characteristics of core music are mainly concentrated on drums and bass. Its rhythm is stable and heavy, and it is often played on 7-string and 8-string guitars. Grindcore, on the other hand, focuses more on guitar riffs and chaotic rhythms, usually without obvious drum beats or bass lines.

3. Performance form: In live performances, core music usually presents a fierce collision of "beliefs" and forms an identity with the audience in the same space, such as with BKD (Breakdown) ) are POGO, Mosh, dead wall and other states. Grindcore, on the other hand, expresses explosive power and rhythm through strong guitars and RIFF.

In general, core and grind are two different styles in rock music, with their own characteristics and forms of expression.