Right, just like the essence of a car and a horse-drawn carriage is the same: travel.

While we're at it, carrier pigeons and telegrams are essentially the same as text messaging (communication), and using the same logic leads us to conclude a bow and arrow is not so different from assault rifles (lethal weapons).

Come to think of it, it's pretty strange you can easily acquire a flare but not a grenade or nuclear bomb, they share the same essence after all (explosives)!

Point being that "sharing the same essence" doesn't preclude a "significant change" between the entities. It's a reductionist fallacy.