Tri-tone spinnerbaits

Two or even tri-tone spinnerbaits work very well when fished deep or near the bottom, while those fished near the surface, above the bass work better if they create a silvery baitfish look.
My decision whether to use round blades or willow-style blades is based primarily on water clarity and sunlight. If the water allows less than one-foot of visibility, it's an automatic round-blade or tandem round-blade configuration.
If the water clarity is one foot or greater there's a little sunlight, and I'm fishing the bait within 2 feet of the surface, then the choice will be willow-style blades for the added flash and sleeker profile.