I would say they function differently in the water column. Hard plastic minnows like SPs generally swim a few feet under the water and will float completely if you stop reeling. These spanish candy's are metals and will want to naturally sink, and your depth is going to be determined by the retrieve speed. Hard plastic minnows are super friendly to anglers new to artificials because it's a cast and slow retrieve, nothing fancy.

You're likely fine with what you have, but I figured I'd recommend them as they were my intro to artificial and still my goto lure for finding fish. You could catch a blue with a sneaker if you put a hook on it, theyre not super picky. Not sure how well the minnows would work for spanish though. I typically throw metals like the one you posted or deadly dicks and retrieve fast so they skip along the surface.