which is better for every day? a black stam or a black city?

The city is more casual IMO. But the stam can go either way, its much more versatile. Plus in 25 years the stam will still work. Not so sure with the city. But this is not fair for me to answer because the stam is pretty much my fave bag of all.
 
city! The style has been around for years now and is still going strong not to mention it is much lighter and very easy to carry. My city is my all time favorite bag of all time!