I am personally of the belief we simply wont be in such a dire situation as to have to choose between Kris Murray and Max, I feel like wing players projected infront of us will fall and its more likely we'd be choosing between one of them and Murray / Max.
Max is much more of a SG to me while Murray is the combo forward, so its not exactly an apples to apples deal either.
Kris Murray is a guy who I've said before, if you believe that his 3pt shooting will flourish in a situation like ours, a situation very different from how he was defended this season at Iowa, that is a big reason to select him. Stands to reason he'd be one of the most ready to contribute right away, but there's also a matter of how many minutes there is for him.
Max Lewis is a guy you take so you can throw him the ball on offense and he can do some fancy crossovers and try and score the ball without draining the shotclock, and you try and bring along other aspects of his game at babysteps, so it's a bit different. Max offers this sort of exotic offensive look for us though, in a best case scenario.