No, suits & tuxedos are different. The main difference is that a tux has satin details. It includes satin-faced lapels, side strips, buttons and the pant leg, whereas suits do not have any. Likewise, a classic tuxedo comes with many accessories like a waistcoat, cummerbund, self-tied bowtie, or suspenders. On the other hand, suits are more versatile than a tux, and you can make many variations based on the accessories and occasion. Also, for a tux, you can only opt for white shirts, but you have endless options to choose from in the case of suits.