I've got a ES-135 and it differs in a few ways. First, the balsa center block makes for a darker tone. It's more like a full hollowbody in a lot of ways - soundwise.
Second, the TOM bridges used on many were cheap and rattled. I was told the TOMs were the same hardware used on all Gibson USAs, but I have a Les Paul Junior Lite from the same year that clearly has a different TOM - I bought both new. I put in a Bigsby, because I mistakenly thought it was the trapeze.
My switch also keeps popping back to the middle spot. I've pulled it out and bent it with pliers, but it keeps doing it. I'll be replacing the switch with a more heavy duty one.
As far as the pickups, my LP Junior Lite had P-100s. Not as horrible as everyone said, but I was using the guitar in a metal project at the time. I've since swapped to a real P-90 and a minihumbucker in the neck, so perhaps that says something about the P-100s
It's hard to descibe, but out of my three Gibsons, this one feels a little lighter and cheaper. Slightly. In any case, the first rehearsal I brought it to, the worn strap I used gave way and the ES-135 landed on it's headstock on a monitor. Barely a nick.
I've since swapped the bridge humbucker with a humbucker sized P-90 and put in a push/pull switch for pickup phasing. The thing is tough and sounds great. It plays just as nicely as my '57 RI Custom or my LPJR.
