There's only one 100w "non Stealth" model, the OG head. The 100w EL34 head is also a Stealth. I have a lot of experience with both 100w Stealth amps and as far as I can hear, the Red and Blue preamps are identical between them.
As for the Green channel, the 6L6 Stealth's Green channel is as hot as it is because part of the "Stealthification" process of modding the original amp was to replace the first gain stage of the Blue channel with the first gain stage of the Red channel. However, the thing most people might not realize is that the EVH 100w amps are actually technically only two channel amps, meaning they only have two truly independent preamp circuits. The Blue channel is simply what you get when you add a couple extra gain stages to the Green channel. Thankfully they went to the trouble of routing in an extra set of channel controls so when you swap to the Blue "mode" you get truly independent controls. It's a neat trick.
However, what this also meant is that when the first gain stage of the Blue channel was replaced with the first gain stage of the Red channel, the first gain stage of the Green channel was also replaced with the first gain stage of the Red channel, which is why the Green channel of the 6L6 Stealth is so gained up. They got wise to this and when they made the 100w EL34 Stealth, they added in an few components to the Green channel to try and tame it back down to relatively sane levels.
