Can't say much about the smaller scale bass, but the smaller scale guitars are awesome. I had a buddy that had a smaller epiphone sg from the 70s, every time i picked it up i sounded wayyyyyyy better than i am because everything is so much easier and quicker. Your bends can go further, your fingerings are just that much quicker. Another super fast neck is a scalloped one, if you ever see one (very rare). A scalloped neck is where they sand out any extra wood off the fretboard in between the frets, so you never actually push down on the wood, you just gently touch the strings, and with super tight action you are there. Yngwie Malmsteen used to play one.