Integrated is an advantage not a disadvantage on a technical level, it's just worse for the consumer as you cannot upgrade them separately. What you should be comparing is the number of transistors to see whether the architecture is impressive or if the speed is due to a size brute force. the M1 Ultra has 4x the number of transistors as the 3090 (probably about half is just the GPU)! It's a freaking humongous chip.