Looks like a beautiful feast. Yeah, for my tastes everything at Johnny Ad's is just a bit better than Lenny & Joe's. Their lobster roll is hands-down the best imo (although the guy with the food truck here--can't remember the name of the truck, but there's a huge lobster on it--may be close; I've only had his once and it was a great as advertised, but I've had so many great ones from Johnny Ad's that I have to try the food truck guy again before I consider awarding the top slot).
Johnny Ad's fried seafood always seems a little fresher to me. I usually go for the scallop roll when I get fried seafood. I like the whole bellies, too, but I can't eat a full order, and no one else in my family likes them (wife and the one kid who eats seafood go for the strips).
Rhode Island clam chowder is my favorite, so I like Johnny Ad's better for that, too--although Lenny & Joe's has only a touch of cream and is also very good.
Johnny Ad's also has a pretty good hot dog, but that's a whole 'nother discussion, and I don't think they enter the pantheon of great Connecticut hot dogs.
On my most recent visit to Johnny Ad's I noticed that they now sell beer and wine, which I assume means that BYOB is no longer an option. That could be an issue, because that is a very big attraction for us at Lenny & Joe's.
Speaking of fried whole belly clams, I always wonder about the Clam Castle across from Lenny & Joe's. I've never been there, nor do I know of anyone who has. But they claim to be famous, and they draw a crowd in the summers. If anyone here has ever eaten there, I would be interested in a review.