If I was a pan fish fisherman it would be a no brainer for me for the horse head jig. Plastic would be any of the several pan fish bait molds - headed up by the 1.75" or 2.5" Small Fry.
For bass / other larger fish - The Do-It casting spoon; and plastic would have to go with the 4 inch Wutz-It. I have not fished the new shad spoon mold bait enough to say it is better than the casting spoon. The Do-It casting spoon in the 1/4 through 1 oz. sizes have put literally thousands of fish in the boat for me over the years. Bream to 50 lb. flat heads and blues.