Hi Blake,
The Asus VivoBook products web page has a VivoBook 15 F513IA with a 512 GiB SSD. The one I bought from NewEgg has a 1 TiB SSD with the model number S513IA-DB74, and the part number 90NB0RR1-M00940. I bought it from NewEgg last Friday and it was supposed to be delivered today but it wasn't due to shipping delays from the bad weather we had. The Learn more link on the Asus product page goes to a page with a couple of pictures, a large blurb about HDMI and nothing more. Using a google search for VivoBook 15 S513IA produces a link to the store.asus.com (it's a very long link so I didn't copy it here) that brings up this exact model number and the description on that page matches the one from NewEgg.