Ail Y'ail y'ail or Ferreira
Celfie is right that they're not in the same league at all. Ferreira = haute Portuguese, Ail Y'Ail Y'Ail = second-generation, playful Portuguese-Brazilian-Québécois (with definite emphasis on Portuguese). Loads of fun, and quite affordable. And Al knows how to handle his seafood, probably better than most cooks in mid/low-range Portuguese places.
A couple of months ago I posted a run-down of a half-dozen Portuguese joints in the Plateau here:
(Can't link to the post, sorry.)
Haven't been to Ferreira in ages, but have not heard whispers of any serious slippage.
Since Ferreira *still* doesn't serve poutine, personally I'd opt for Ail Y'Ail Y'Ail. :^
re: Mr F
Well, it's poutine, the menu is mainly Portuguese, and the chef is Portuguese (I believe Montreal-born, but not sure), but I wouldn't quite call it "Portuguese poutine."
The one I had -- the signature dish, called "Al-phrodisiak" after chef/owner Al -- has a mountain of mussels, clams, calamari, shrimp, scallops and a small amount of bacon over a generous portion of cheese curds and fries, and a garlic-cilantro sauce. There's also an extra bowl full of the seafood and sauce, or at least there was when I ordered it. It's a truly substantial meal, and may be the second most expensive poutine in town at $17.
It sounds like a train wreck and there's no way it should work...but it does. I was very skeptical when I saw it on the menu, but after seeing it on another table I had to make a return visit a few days later to try this stuff. A bit excessive for lunch, but I have no regrets.