#2
the vmntx is a cheaply made signature guitar and the vmnt1 has the livewire pickups and is made nicer...go for the vmnt1
#4
Bolt-on somewhat brightens your tone, and it's a huge plus if you break your necks often (which you probably don't).

It's not an easy which-is-better issue though, as the VMNT1 is about three times as expensive as the VMTNX. Ofcourse the expensive one is better. But it's got little to do with bolt or neck-thru.
Phrases Label
The Bohemes
---
The White Strat w/Dimebucker
Tokai Explorer Korina
Ibanez RG570 Purple Neon
Gibson Les Paul Deluxe Ebony
Fender Telecaster Apple Red
Dano '59 Burgundy
Ibanez Artcore AM-73