> Sort of like how every brand of battery-powered drill you find at the store is very similar, despite being head and shoulders better than the best drill from

> Sort of like how every brand of battery-powered drill you find at the store is very similar, despite being head and shoulders better than the best drill from 25 years ago. They all get made in China, mostly all in the same facilities. Designs tend to converge under such conditions. Especially since design is not open loop - you talk to the supplier that will make your drill and the supplier might communicate how they already make drills for others.