RazrAsh, it just means how the neck is joined to the body. No change in scale length.
Either guitars are fine with me, but i prefer a F-spaced string spacing, and if there's 6105 frets, then 24 3/4 scale is fine with me.
In my opinion, its not totally about the feel of the instrument, as seems to be the main thrust here. Really, if you are a good player, you can expect to play well on different guitars, not don't expect optimum performance lah.
I get frustrated with single coil bridge pups, because I don't like the tone. I get upset with Les Pauls because there's this overwhelming midrange that sticks out and kind of clouds the clarity of the tone.
If the guitar doesn't sound like what you are used to, or what you prefer, then its no longer a guitar you should be playing, regardless of make/size/weight/construction/physical properties.
Why does Vai play Evo? Cracked up, falling apart? Why not just get a similiar 7vwh, brand new and all. Its the tone man.