Different baits, but very similar. Grandmas come in longer lengths and the lip on the Grandma finishes horizontal compared to the Jake which is perfectly flat.
There's no need to go crazy with trolling baits. I have about 5 favs that are always in the rotations. 13in Grandma (Prism Firetiger and Black silver holo), Legend Outcast, Legend Perchbait (Jointed and straight), Legend Plow and a BWB 9in Deep Herring.
That does it for me no matter where I fish.. Gbay, Nipissing, Kawarthas, wherever. Lures are made to catch fisherman with a billion different colours. Colour is the absolute last thing I consider when making a lure decision. Action, depth, speed, to me are much more important factors.
IF the water temps are still high 60's/low 70's keep tossing those bucktails! Find the weed edges that drop into 15-22ft of water. You'll eventually get bit man, and THEN you'll be hooked Goodluck!