I split my carry between a Ruger SP-101, hammerless, .357, with PDX1 winchester, 158 gr ammo, with one reload in a speed loader and a Rock Island Compact, 45 cal, winchester 230 gr PDX1 ammo with an extra Mag. My decision to carry what is based on perceived threat (large crowds, activity, etc.).
The ruger is lighter and I am more proficient with a revolver so I feel more comfortable with it. I still consider myself in a learning mode with the 1911 platform but I also have a S&W 1911 Full size (same ammo as the Rock) that pulls bedside duties only.