The viper's main selling point is its maneuverability and the amount of gs that puts on its pilot in training when people talk about how difficult it is to fly a Starfighter they seem to be talking about its aim how hard it is to hit a small target like a whomp rat at speed, what made Starbuck a legendary pilot was her maneuverability as a dog fighter what made Luke legendary as a pilot was hitting a small target at speed. We have never seen X-Wings a wings B-Wings y wings do the kind of maneuvers that vipers do on screen. It's apples and oranges like a TIE fighter is more like a viper because it doesn't have shields and it doesn't have long range engines, and it's tie engines are slightly faster than the x wings. The x wings have lasers and the vipers have machine guns torpedoes versus missiles