UM Vs FIU honors

I am majoring in chemistry (maybe double majoring in math) and am on the pre med track. I will also have my A.A so I hope to graduate in 2-3 years. I have a full ride to FIU Honors plus I will be getting money and for UM my parents would be having to be around 15k a year. They have said that this is no problem, but is it really worth the extra money as in the opportunities and chances of getting into med school? I know if I go to FIU i can probably have a higher GPA, but idk if the prestige or harder classes will help me get into a better med school.