The lower-end 8S has a plastic body with a 4-inch WVGA screen and Corning Gorilla Glass, a dual-core 1GHz chip, 512MB of RAM, a 5MP camera with 720p HD video on the back but no camera on the front, and 4GB of built-in storage with the ability to boost to 32GB via the microSD slot.
Both will arrive in November. HTC is yet to reveal pricing.