What are the differences between 6/8 and 6/4 time signatures in music?

The main difference between 6/8 and 6/4 time signatures in music is the emphasis on the beats. In 6/8 time, there are 6 beats in a measure, with each beat divided into 3 eighth notes. This gives the music a compound feel, with a strong emphasis on the first and fourth beats. In contrast, 6/4 time has 6 beats in a measure, but each beat is divided into 4 quarter notes. This creates a simpler, more straightforward feel with a stronger emphasis on each beat.