#1
Title says it all. I played my Dual Rectifier with a friend who had a Rockerverb and our tones were very similar. Mine was slightly tighter whereas his had just a hair more fuzz on the treble. I'm curious to other people's opinions on if they sound similar in playing sludge metal kind of stuff.
#2
I had a Rockerverb 50. I thought it sounded very generic and boring. I traded it for another Dual Rectifier.

I spent years on Vintage as I always felt Modern was too scooped. I switched to Modern probably about 6 months ago... not really sure why, just needed a change or something.