A:AnswerThey both serve the same purpose.
Smart Fire TV is Amazon Fire program based. Still have all the apps under the Amazon Fire overlaid while connected to the internet.
Smart TV does not have a main program like Amazon Fire. The TV will have it's own app download without a main program controlling it.
A:AnswerThe outside of the panel, without the stands, is 21-1/2" x 13-1/2" x 3-1/8" deep. With the stands it is 14" tall x 7-1/8" deep.
I have it mounted to the wall, though.
A:AnswerYou can download the Xfinity app to the Fire TV. It will require your Xfinity login to verify and access the services you're subscribed to. One note is the cable channel navigation experience is not great as voice navigation is not supported on the app. The TV's remote does not have number pads to go to a 3-digit channel easily. The workaround is to "favorite" the cable channels you normally watch so that only those channels are listed under "Favorite Channels".
A:Answer1) You can download the Xfinity, Peacock TV, ESPN and NBC apps on this TV.
2) The built-in WiFi is 802.11 a/b/g/n/ac; 2x2 MIMO (2.4 GHz and 5.0 GHz dual band).