Others can chime in about the multiwatts, but from my experience the earlier 2-channel Rectos have less fizz than the 3-channel ones from the early 2000s. The all have a pretty full range sound, with an extended top end and bottom end response. That’s the Recto sound, and it gives them more sizzle/grind/fizz than many other amps.
In my ‘94 Rev G, I can dial most of that out by keeping the presence low (9:00) and treble reasonable (or on 0, which is an EQ “trick” for them). I like some of the sizzle, so I tend to not totally dial it out, meaning that I run my presence higher than that and treble at noon to 1:00. This all assumes Modern/Red mode. Vintage mode has no fizz on my amp.
From what I understand, the multiwatt should be pretty close to the 2-channel sound. From the clips that I’ve heard, they seem to have more clarity than the earlier examples, but a really similar vibe. You should get a good feel for the Recto line by trying a multiwatt. That’ll give you a sense for the mids and the feel. If I didn’t have an older one, that’s where I’d look because of the additional versatility of an extra channel.