A notable common difference between the two include a tuxedo usually being single breasted one button vs a lounge suit being single breasted two button. Further, a tuxedo will usually not have flap pockets on the jacket in an attempt to minimize bulk and maximise sharpness. A tuxedo will generally be confined to a plainer pattern details and a conservative colour pallet (black & navy) whereas the lounge suit will have almost limitless colour and pattern options. Finally, a tuxedo will usually have a shawl or peak lapel as opposed to a lounge suit usually having a notch lapel.