Rent amount 1st floor vs 2nd floor

[Max Pryor]

Hi all, I own a two family that has identical units. Both floors were renovated at the same time. The first floor has full basement access and second floor has full attic access. My question is what should the difference in rent be for the first floor vs the second? Being on the first floor plus having basement rights should be worth more than second floor with the attic right? Thank you in advance.