Funny because I just bought and returned a Fender American Pro II J5. It was actually a decent instrument but after a few years of playing my BB435 the playability of a Fender 5 stringer was quite a bit inferior compared to Yamaha. At least for someone with smallish hands. Also, since I mostly play my BB (like my JB's) soloing the bridge pickup, there wasn't a big discernable difference in the tone. Of course, the price was a big factor as well. If the Fender had been clearly better sounding and better playing instrument, I could've justified the price two-three times that of a BB435.
I've always thought of myself as being a Jazz bass guy first and foremost, but this latest experiment has shown me that the Yamaha has really grown on me. I guess I didn't quite realise it before trying out the now returned AM Pro II V'er.
Couldn't agree more.