That is a hard one. I know which I would pic but it depends on what you like.
Lets say both are very accurate and reliable
Numerous trigger options (exposed hammer)(Option of manual safety)
Mag release reachable by both sides of weapon
Unique recoil system (works very well)
Constant trigger striker system
Traditional mag release
All I can think of for now. Best advice since both a great guns is to get the one that feels best!