The x600 has everything the x500 has and more!. It’s just lacking the illumination on the top spatial speaker 😂 (some may like the illumination) personally, it’s all about the sound quality ❤ and, here there is no contest with the x600 having 2 drivers , 2 tweeters, 1 passive radiator, 1 sky driver and a total of 3 separate amps and 50 watts of output compared to the 40 watts the x500 offers. I would only consider the x500 if portability is really important to you. When on sale which is 3 to 4 times a year there is only £20 / $25 between them both, the x600 being the higher , but totally worth it in my humble opinion. Have a fantastic day, and happy listening.........