Another local Hound's bemoaning the weakness of the food at Sunset Cantina, sibling to the much-better Sunset Grille and Tap, got me thinking: what other well-regarded Boston restaurants have spun off inferior secondary concepts? For example, I think Ashmont Grille is a worthy second restaurant from Icarus' chef/owner, but a lot of Dot Hounds clearly dislike it. I genuinely miss Rouge, a plank in Tremont 647's ill-fated brand extension scheme, but not enough other folks liked it well enough to keep it in business.
I concur that the Sunset Cantina's food is vastly inferior to the merely-passable food at the Sunset Grille, and would add a few more ugly sibings to this list:
* All non-original Pizzeria Regina outlets
* Bonfire (compared to the original good-old-days Olives, anyway)
I know I'm forgetting some others.