Yes, the letters at the end of the model number define the distribution channel. Can't remember exactly, but RW might have been Walmart, while the X is all other retail channels. But don't quote me on that. But the hardware is identical.
Dan
Roku Stick (3600), Ultra (4640), Ultra (4670), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.
