In fact, sometimes I think there is no difference between the two majors. However, we mainly look at lesson plans. Some teachers think that since it is called digital media, we can learn more things in the direction of computers. But as far as I know, visual communication also uses a lot of computer knowledge. If you say it is difficult to learn art, it is not. Just to see if your creativity is enough. It needs a lot of accumulation, and it is certainly not easy to accumulate. Mathematics foundation is not necessary, but learning advanced mathematics may be necessary.