Been a ton of similar muskie lures for years before the Plopper.
Yep top raiders are basically big whopper ploppers and they've been around a LONG time. The fat B from lake X is relatively new musky lure. It's essentially a fat top raider or a nightwalker with a 90 degree bend in the paddle tail. It does make a different sound. Coincidently I did catch a 5lb LMB off the Fat B earlier this year. That may not sound impressive, but I was musky fishing not far Canada so that's an absolutely giant bass for up there.