Sport shirts tend to be more bold, possibly with patterns. They will have more detailed styling as well such as pockets, plackets, contrast stitching, button down collars, different size collars and more.
Is the collar on your shirt looking like a plant that needs to be watered?
We suggest going 1/2 - 1 inch smaller on your casual dress shirt neck size. This will help keep the collar up and look more crisp. No more flop! A button or hidden button down will also help