Why are the Pro-Line and CRP ORV Hop-Up Bumper Exactly the Same?

The Pro-Line and CRP (Custom Racing Products) dyeable white nylon bumper have both been called a "must-have" Hop-Up for the Frog and other ORV (Off-Road Vehicle) chassis R/C model vehicles. However, when deciding between the two, many vintage Tamiya radio control hobbyists realized that the two hop-ups were exactly the same. Why is this? We dig into this mystery and solve it in this episode of the RC Deep Dive podcast.