What do you think? Bivol easily. Sturm is a natural middleweight, never fought at LHW. Having said that Bivol would even beat him at SMW without any problem.
Bivol is kind of special. That style combined with that speed of hand and light footwork is rarely seen. Sturm was good but let's be honest he was not 'special'.
Bivol and possibly by stoppage Sturm was talented and beat some decent fighters but he'd be out gunned