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i like your concepts a lot!
to be honest i can almost see a new direction with the first design. you have used the kiwi and the silver fern leaf to form a new sea creature: a sea kiwi. much like a sea horse. the makings of a unique approach are there.
barring that i think design #2 using JUST the silver fern leaf is clear enough. i would remove the shape and keep it simple.
try to imagine with the fern/kiwi would look like from 5-10m away on a t-shirt or on a baseball cap.
i think the leaf alone is strong enough to carry the unique look. it's not only a leaf but a wave as well.
