Which would sound better at low volume ? And i've heard the jubilee has problems getting a clean sound

(1) My question is are the 2555 as good as the original jubilees? I've read a lot of mixed reviews some saying it doesn't compare to the real thing , some saying its better and so on. I have checked all of the clips for it but i can't really decide. Does it come as good as the 2555SL - here



 ( )



I'm going to order either the 2203 or the 2555 anyways if i don't wait up to see the AFD100. And i don't know which one to choose.
I'm mainly playing GnR.
(2) I'd also like to know if the 2555 can replicate 2203 , because i've heard it can but not the other way around.
Also another question - since its a 2 channel amp - lead / rhythm , (3) can i use the guitar's volume knob to go from overdrive to clean because thats my prefered way of channel switching?

So far i've bee told that it won't sound the same because of transformers and clipping diodes

Hope you can help me out and answer my questions ( 1,2,3)
Thanks a lot !