Sorry, but what do You want to say with that ??
Is Your intention to discuss the typical design elements, which are similar to other foreign types of similar roles ? ... as such that's quite clear since "form follows function".
Or do You want to discuss their gestation and development, which is surely often "invluenced" or even derived from existing types ?
Or do You even want to start such stupid discussions, which are so common to the Key-Forum as well as others that the Chinese can't develop anything on their own and all their products are copies .... then I might ask You to do that at the Key-Forum.
So what do You want with that tread ??
Deino