Avoid L3 Harris, don’t know much about the other school but if it’s Integrated stay clear. There’s no justification to pay obscene amounts of cash for the same licence you’d obtain through modular training. You can also complete a modular course faster than an integrated scheme.
Terms and conditions have fallen to their lowest I’ve ever seen - £16k with little in the way of job security or guarantees of anything.
Consider how wise of an investment a career in Aviation is right now.