They dont snare, like meteor hammer. Also they do ranged damage instead of melee. So there is still a difference. Also meteor doesnt need to switch form manually so it is easier to use. Although i must say hakka was stronger overall. The hp of meteor hammer is just too low.
I think the unit should be remade into a version of a berber camel, i.e. good against other cav only and nothing else. Units that are good against everything (Ashigarus, Gatling guns, etc) sort of break the RTS game design and encourage boring play of ‘spam one unit to win’.