1 its more funny. I mean the animation is bad but we can't deny the comedy is topnotch and makes it light hearted like the original Dragonball.
2 I love the slice of life episodes. I mean its so awesome to see what the z fighters do when they r not training I mean thanks to super now we know ktillin is a police officer
3 the introduction of the multiverse. In super we see that that there r more universes in Dragonball like when we r introduced to universe six and during the tournament of power .
4 how it utilized broly. In z we met broly in uncannon movies but he was a little bit dumb and is origin was stupid in super however he was used way better in the dragon ball super broly his origin makes more sense than in z and the action sequences in the movie were awesome better than anything in z