I can't really compare to a Roadster, as I have never gotten the chance to become intimate with one, but I like the way my Road King (version 2) sounds more than a standard Dual/Triple recto. Keep in mind, though, that the sound is a lot more tweakable with different power tube options and different speaker cabinet options if you happen to have more than one cab. For example, I've been running 2x6L6 and 2xEL34 for my regular high gain tone, and it sounds different than a Dual, which runs 4x6L6 all the time. I'm not positive on 4x6L6 in a RK2 vs a DR, though. I've never done a side by side comparison of that specific scenario.