Julian vs. Sean: Only one can survive

Everybody sadly realized that Julian wasn't as good as John at writing songs that catch our ears and for me personally, even though losing John was extremely sad and at the time of "Valotte", I really enjoyed hearing an almost John Lennon voice again, when Julian came on the scene, but that novelty quickly wore out as each following ATLANTIC album came and went, with songs that did nothing for me. Now, if you go many years away from the "Valotte" album, you will find some worthy material (Photograph Smile and beyond).

He is still far and away the most commercially succcessful Beatle child musician.

Julian wasn't as good as John, but he was a million times better than his half-brother Sean.

Agree.
I see Sean too much hipster

I look at it this way, given how lousy, negligent, and downright cruel his father could be to him (and not to mention his mother), with the added pressure of being the son of John Lennon, idol of a generation, it's a testament to Julian and his mother that he turned out to be the person he is.

This is how I see his as well (but I think you meant step mother, regarding the cruelness).

As a songwriter yes, but I'd say Zak has been more successful in the family business overall.

Meanwhile, some of the best music made by a Beatle kid has gone largely unnoticed.

One rather plaintive detail: Julian does bid happy birthday to most, if not all, of the other Beatle children on his fb page. I'm not sure they do the same for him and I'm not sure how aware of him the other Beatles children (Sean apart) are.