#18 I like for the simplicity. The Z hidden in the leaves and circle does not stand out. The font on Zealthy is basic and not as eye catching. Keep in mind that this needs to be seen from a distance, and up close. Try using some additional colors - gold, dark blue, black, grey, etc. I feel the name will blend in with the trees on a mobile food cart, trailer and truck.
# 14 is unique, but without additional color it blends into the leaf. Additionally the font, although modern looking, looks too Asian and Zealthy will be serving 15 different menus, with Asian only one of those foods.