Mexican Fan palms have more stiff leaves. The leaves are more vibrant green and they also have sharp thorns. The Cabbage i believe do no have have thorns. The trunk of the mexican fan palm stays more orange but when they shed the outer dead leaf remains they do also have a white grey trunk. The mexican fan palms grow up to 100 ft. The Cabbage palms stays at 20-30 feet. There head look smore like a bush and the mexican fan palms looks more compact.