Contact your TAM/SE. This is where we received all of our info on it and had our questions answered.
There isn't much info publicly available except for these (and PDF attached):
https://www.symantec.com/content/dam/symantec/docs/data-sheets/endpoint-protection-14-en.pdf
https://resource.elq.symantec.com/LP=4986?cid=70138000000zViMAAU&inid=symc_endpoint-protection_pdp_to_leadgen_form_LP-4986_delivering-zero-day-defences
...and I doubt pricing is going to be discussed on a public forum, specifically when it can vary for each customer.
Your TAM should be able to answer your questions.