Sure, it's just a bunch of algos.
That's incorrect.
CryptoNote is a protocol. X11 is a PoW algorithm using a chain of 11 hashing algorithms.
Many CryptoNote coins use the CryptoNight PoW algorithm, although some do not. Currently, there seems to be little advantage to using X11 over CryptoNight, as CryptoNight is also relatively light on heat and electricity consumption, and it has the added advantage of reducing the performance gap between CPUs, GPUs, and ASICs, which is something X11 does not do.