I say that if the shorter scale was that significant to you, I'd definitely go for the jag ss. The quality of the VM Jazz and the VM jag ss are comparable (and heads/shoulders above the bronco).Given the opportunity, would you pick up one of these, or a VM 70s Jazz Bass?
I got to play the Jazz at my local GC yesterday and it sounded great through the Rumble 100 I'll be picking up on Monday. I played around on the Bronco and much prefer the shorter scale. I can't physically get my hands on the SS Jag because nobody in my area carries it.
Both of these would be the same price which is why I'm torn.