I have a 2009 that's 8 lbs, my friend has a 2008 that's right at 9 lbs. Mine has a more pronounced bump in the mids, the heavier one is a little more bass heavy, though they're very very very similar. Is it the weight? Could be... Too many factors. My pickups read higher in resistance, I have a stain where he has a goldtop, those might also be factors... Very difficult to say.