Old dino on reverb

The seller says this is not a modded Marshall but a real Dino. I believe that is half true as this appears to be a rebuilt Marshall with a Dino circuit inside. Transformers are stock Marshall.
I would love more history on the amp, Im interested in it.

What is the difference between this model 8xx and the other Dino 9xx series ?

What is its voicing? Does it do a nice clean and a very heavy Tight rhythm sound and also lead sounds?