Are both of these PCIe, or is the Optane option via SATA? I can't tell on the web site, and no one at HP seems to be able to give me a verifiable answer. The HP system configurator seems to suggest that Optane is the more expensive (sc. better) option and is on sale at the NVMe price. I would think that Optane with PCIe would be best. Here's the system link: https://store.hp.com/us/en/Configur...1&urlLangId=&quantity=1&color=dark+ash+silver