Ford changed a few models to OAT, then backed away from it. VW, Audi, and Porsche are OAT users, too, but most others have resisted. Instead of OAT, most new cars now use a hybrid antifreeze that's formulated with both OAT and the silicate inhibitors from green (Japanese hybrids have different inhibitors). It comes in too many colors to pretend this type is color-coded.
Previously the USB port on the back of the device was locked down and couldn't be used for storage devices, but thanks to the recent updates, additional storage space can easily be added via a USB flash drive. Note that this update is for the Fire TV box only.
Voice remote. The Fire TV comes with a voice remote whereas the Fire TV Stick comes with a standard Fire TV remote. For an additional $10, you will be able to get a voice remote with the Fire TV Stick as well. Memory. The Fire TV is equipped with 2 GB of memory and 8 GB of storage.