I thought you didn't know how to walk-the-dog? A Sammy is a walk-the-dog-type lure and according to one of your questions, you say you don't know how.
Whatever. I don't understand WHY you want to specifically target 2 pound fish. That's ridiculous. But to answer your question, 65- or 85-size Sams won't matter. They're both small and will probably getcha a dink or two. You might want to try the bigger 100- or 115-sizes. Better yet, a full size 5" Zara Spook.
I've gotten bass between 1 1/2 and 10 pounds on a 5" Spook. Not to mention a 17" 2 pounder on a 7" Magnum Spook.
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