That's why my first choice would to keep both, The only way he can develop is to ride the bench for a few years, if you throw a goalie into the number one spot before he is ready, you can absolutely kill his confidence and that is career threatening to a young goaltender. Let him ride the bench watch the games, figure out shooter tendencies by watching and learn the craft before taking te net full time. Most goalies had to ride the bench before they were great.