Both are good, but the Beetles had a depth of music that goes beyond most bands. Anyband can play songs with four chords, and some do it well, but only musical geniuses can do what the Beetles did. They wrote some of the rules found in today's music. Of course, there will always be a genius or two to come along and break all the rules, eg - Jimi Hendrix.
Speaking of Hendrix and the Beetles, I recall seeing an interview of Paul McCartney (I think), where Paul said that they had just finished writing a song and played it for the first time to an audience. Jimi Hendrix attended that show sat in the front row. The next night the Beetles went to see Hendrix perform. He was supposed to be up and coming. Paul said that when Jimi played the Beetle's new song, "Sgt Pepper's Lonely Hearts Club Band," their mouths dropped to the floor. Jimi had heard the song played only once, the night before, yet he came out and performed it with amazing skills.