Musicoin is inflationary coin I don't think it is a good coin to invest supply is big a lot of miners mine it.
This inflationary argument vs. Musicoin I think is a misconception. People use Musicoins to listen to music, currently. Soon, it will be like a fraction of a Musicoin. (About 2 weeks I hear). When that happens, the price will go up I'm guessing.
As for Artbyte vs. Musicoin, I think they are like apples and oranges really. Artbyte's music support is really just an online shopping cart you could do with Bitcoin. Whereas Musicoin is a streaming platform geared to ongoing, live music consumption.
I think both are cool coins. but Musicoin, as the name suggests, is for Music.