I realize no amp that's actually a different tube/circuit, etc is going to be the same, but I was wondering, tonally is the 18w Marshall clone in the same tone camp as the 50w Plexi type of Marshall? Another way of asking what I'm getting at is, if I like the 18w tone but want more volume and clean headroom, is the 50w Plexi what I'm after? (I do realize that there's a 36w version of the 18w clones also, so that answer I think is a bit more "obvious"). Also, since I'm a big Zep and Hendrix (classic rock/blues in general) fan, and I know (I think) a lot of those guys used 100w Plexi's, is the 50w Plexi basically a lower volume version of the 100w? Is the 100w Plexi the same as the "Super Lead"? If they're two different things, which was used by who, for reference?