Two different styles of trigger. Have you fired and had experience with da/sa, like that of the Sig? I personally like it, but the Ruger sr series guns have such a fantastic trigger, like that of SAO, that I'd have to go with it. I can see how this would be a hard choice though. Sig makes some of the most quality firearms there are. Good luck with your decision man!
As for help, I'd choose the gun with the trigger type I've had most experience with and which I shoot the best. This is why I would choose the Ruger sr40.