Superman's advantages:
Speed
Better reflexes
HV as a long range attack
Freeze breath as a slowing down tactic.
Ability to vibrate through attacks.
BAs advantages
Strength (unless superman let's loose completely as in OWAW).
The Speed and reflex advantage will help Superman get far more hits on BA than he gets on him. This will offset the strength advantage. Adding in hv and freeze breath (to Slightly slow BAs motion) then Superman wins this handily. If Superman chooses to use his intangibility ability to evade attacks then that adds even more to Superman winning.
Superman isn't dumb. If he realizes that BA is twice as powerful then he will turn it up and fight smarter (using speed to his advantage, hv as a long range tactic, freeze breath to slow BA down slightly, using his ability to drop his mental blocks to increase his strength, use intangibility to avoid attacks, etc).
Most are only considering strength in comic fights (which is the least important advantage when one character is within a couple times stronger). Superman is more than 2x stronger than Thor but if speed was equalized Thor would beat Superman for the majority. I can name many comic fights where the physically weaker can beat the stronger by using other advantages.