Only difference I can see between the two is the finishes. Bella bar has more options with the cerakote finishes. Guess it really depends on where you live and how much barbell maintenance you want to do to prevent rusting.
You don’t want the B&R bar if you are worried about rust. One of the cerakoted Bella bars should keep the rust away. The zinc coating on the regular bella bar will slowly wear off like it has on my ohio bar and then it will begin to rust.