i'm going to stick with what i originally said (what did i originally say? :lol: ), but add in the caveat that it depends on what type of music you're playing, and how well the gear you're currently using suits it. For example, if you're playing modern metal, and currently have, say, a mesa recto, changing to, say, a soldano avenger might make a slight improvement (or deterioration) of the tone, depending on the type of metal being played and the player's personal preference, but won't be an earth-shattering difference. But if that player were using, say, a jazzbox and then changed to an ESP or something, that'd make a major difference to the quality of the metal tone.
Each case on its own merits, in other words. :)