The old black one is a copy of the Les Paul from back in the early 1970's.
It has Gibson hardware & Grover keys. I had the pickguard custom made. The Gibson part would not fit right. This is where I got the skull mounting rings.
http://www.guitarheads.net/ They have some cool stuff there.
The blue one is an RG-320-DX. It has a Dimarzio pickup in the bridge position.
I ordered the mirror pickguard off the internet, but I forgot where. The black one has a little deeper tone, but they both ROCK. I just had the JCM900 retubed & setup. I use all BOSS pedals, except for the vol/wah pedal. They are mounted on a wooden platform made by me. I get the old 80's sound real good.
My 4X12 cab is not a Marshall, but it does have the good celestion speakers that I rewired with monster cable.