(Granted, not the best example since some of those are noticeably different).
This basically happens every time a yoyo design becomes trendy. It happened with tri-brids (Connection, Boundary Plus, Trio, etc - again, there are still differences) and all these super wide throws (Mega Monster, Super Scintillator, Galactus). It’s the name of the game, even if it does seem like companies look off the other’s paper sometimes lol.