You can compare Bocchi and K-on based on the fact that both are slice of life animes of cute girls doing cute things with a music element, but aside of that they are shows with different focuses, so it's not really fair to say that one is better than the other.
That's like saying two completely different dishes are comparable just because both have egg in it.
SO, i watched the last Bocchi episode and let it sleep a bit. Overall i liked the series a lot and it's a solid 9/10 for me, particularly for all the humor, the animation and the good characters.
On the last episode i expected a bit more of turnoil and conflict but overall it was very good. Hope and pray for a second season.