A:Answer LC70C6400U - no 3D, 240backlight refresh rate instead of 480, no subwoofer, dynamic contrast ration 4,000,000:1 v/s 10,000,000:, no quad pixel plusII or technology, uses 29 more watts of power consumption.
I own a LC-70LE845U and am extremely happy with it.
Everything depends on what you wants & needs are v/s your pocket book.