As I recall, ModDemix introduces a bit of a twist near the 0V line, so it’s not like clipping but almost the opposite – the distortion is more of a factor as the overall sound level quiets down. It’s not extreme, it’s kind of interesting but might not be something you want as an only VCA.
For a compact dual VCA with character, I really like Tallin. Three different drive settings, all of which sound great, and both linear and exponential CV inputs. Sometimes I’ll run stuff through it just to heat it up a little, but if you don’t push the gain too much it can remain pretty clean.