Toshiba M450 QLED 4K Fire TV vs Toshiba 50LF621U21 50-inch 4K Fire TV

Buy the M450 if you want a QLED panel with better color and contrast, Dolby Atmos, and a newer Titan OS. Buy the 50LF621U21 if you want a larger 50-inch screen and Dolby Vision support at the entry level. The M450's QLED layer and Atmos give it the edge on picture and sound quality, while the 50LF621U21 wins on size and format support. Both are 60 Hz Fire TV sets with average build, and owners of both lines report the usual budget-TV trade-offs: decent brightness, limited viewing angles, and basic speakers.

• Choose the Toshiba M450 if you want QLED color, Dolby Atmos, and a 43-inch set for a bedroom or smaller room.
• Choose the Toshiba 50LF621U21 if you want a bigger 50-inch screen and Dolby Vision support for a living room.