Tuxedo vs. Suit
Tuxedos and suits have very different functions. While a suit is more a conservative affair and mostly worn to work during the day, a tuxedo is more for semi-formal evening events. On a suit, the lapel will be the same cloth as the rest of the suit, with no embellishments on either the jacket or pants. Tuxedos, on the other hand, tend to have a satin lapel and satin stripes running down the outside legs of the pants.
Both tuxedos and suits are worn for weddings; if you are opting for a more casual event, suits may be the way to go. On the other hand, if you wish to have a more elegant wedding, you may want to go with a traditional tuxedo. Either way, you'll surely look your best!
Suit Example Tuxedo Example