I love both but like bolt on better soundwise. Somehow it fits my way of a hard fingerstyle playing better. With Mr. Hook...well I think on one side a signature should be like the bass the the artist ist playing. On the other hand, if he now is playing this kind of Yamaha and is happy with it... fair enough.
What I find really important is the price. I don't see the point in a 3000+ Euro / Pounds instrument that you can't afford buying. Times changed and we all (!) know, that a bass does not have to cost a fortune to be an excellent instrument. Even less, when we are talking about a bolt on 4 string bass that is nearly a thing of the current production? Or am I wrong that it will be the shape of the today's BB series ?
Besides that...I am very exited and hope to get one in my hands 🙂 I do have very good experience with Yamaha signature basses ! 🙂 (NOT talking about the BS basses)