The difference between karate and judo is that karate is a striking art. That means karate’s focus is on punching and kicking. Judo doesn’t do kicks and rarely punches because it is a grappling and throwing art.
The difference between boxing and karate is that boxing focuses on punching to take opponents down quickly. It is best for street fighting. Unlike boxing, karate is a complex system of forms and techniques with an underlying philosophy. It is ideal for professional fighting. Both disciplines, however, work well in MMA.