The Premiere+ is an actual STB. I has connections for HDMI, Ethernet, etc. The Streaming Stick is literally like a large flash drive that you plug directly into the TV's HDMI port. The only connector that it has is a micro-USB port for power. Operationally, they both work the same, but the Premiere+ supports 4K UHD and HDR, whereas the stick only supports up to 1080P resolution.