Steel is Steel, and acrylic is not.
Steel has an enamelled finish, easy to clean etc, but, do not drop anything in it, because once chipped, the coating is finite, history, the end.
Acrylic will groan and flex, but maybe easier to fix tight to the walls as they tend to have a wooden frame to screw wall brackets to. Surface requires very careful cleaning, NO Jif/Cif etc
As it happens I use 8vostik 'st1cks like sh11te' in a tube to fix both types back to wall, orack hard n 30 mins, while I get on with another task.
HTH
DH