Compared to a clincher of the same width, a QUALITY tubular will be more supple, handle better, be far more resistant to pinch flats, be far safer in the event of a flat at speed, and have lower rolling resistance ( no matter what the various tests show). I have no idea about tubeless. It always astounds me about the people who consider tubulars to be “ too much trouble” but gladly go through the satanic rituals required to set up and maintain a tubeless setup…..then there is the tubeless roadside repair kit, also known as a cell phone. Tubular tires exist despite the marketing might of an entire industry for one reason; there are performance advantages that they offer that are not equaled by any other setup. If you are tempted to try them, by all means do so and experience them first hand….just go all the way with quality tires and wheels as the cheap versions lose all of the advantages.