wardieboy, the differences are on 135 upwards the neck is 1 piece, the back is 1 piece, the pots caps and jack are
upgraded, tailpiece is aluminium and the bridge is chrome over brass saddles.and the neck joint differences.
the backs on the ls100 down are 2 or more piece, i don't think this is a big deal, i think the necks are several pieces
too, not sure how important this is, woodmachining is excellent nowadays.
this isn't to say the ls80 isn't a good guitar. you may love the stock pups which are the same.
i'd love to hear say an ls150 against an ls 80, i'd bet my own money i wouldn't be able to tell the difference.
check youtube out.