I really dont think the XV sounded any less bright than my EG5 when I saw Kings X twice a few weeks ago. But then again I run EG5 with bass boost on 2 and the module really isnt bright at all anymore if you do that and dial the treble to a suitable level.
I would say it probably had less gain though, but I didnt really see where the knob was set. Ty probably similar a amount of gain if you had set it at 9 oclock on EG5.