Tasted Bonal, Byrrh and Dubonnet head to head.
Bonal is brownish, with a nice, sweet, fruity/plummy flavor. A hint of bitterness, not syrupy/cloying. Excellent.
Byrrh is the lightest color – ruby/reddish. Light and fruity flavor (weirdly like Cocchi Americano, but the wrong color), with some drying bitterness. Delicious.
Dubonnet is dark burgundy/maroon, and is the most sweet & fruity (not cloying). Excellent.
The 3 are cousins, but not subs for each other.