Hi Les,
Tacony is the owner of the Fuller Brush Power Maid, The Riccar Squire and the Simplicity Spruce. All are similar vacuums with the same body in different colors and the Riccar and Simplicity have Two Speeds and LED Headlights where the Fuller Brush is one speed.
Shark looks very similar but as far as I can find online, Shark has never been a part of the Tacony line, and have always been made by a separate company. I thought it looked similar too, but I think it’s just a matter of one company “borrowed” the look and style of the vacuum, I’m not sure who made which first. Lol
I own all three of the Fuller Brush, Riccar and Simplicity.. so if anybody has specific questions, let me know and I’ll be glad to answer. Otherwise I hope that answers your question that Shark simply looks similar and is not an identical vacuum from the other three.. to my knowledge.
Thanks, Patrick