A:Answer TVbuyer22 - Both Q60B and Q70A models feature Dual LED backlighting technology. When stepping up to the Q70A, you gain the advantage of our Quantum Processor 4K with Machine Learning AI, further increasing the clarity and smoothness of your 4K picture with an ultra-fast processor that adapts to every scene, no matter what the source. You also gain the advantage of Motion Xcelerator Turbo+ which allows you to see action scenes, sports, and gaming with minimized motion blur. Motion Xcelerator Turbo+ also supports advanced features like FreeSync Premium Pro for best game play available. ^Gina