Wow - I just posted a long review on this topic. Their is a huge difference at least on their M70-D4 Model. Its actually not a TV at all. It is a really nice monitor. Google cast is like apple airplay. You can watch whats on your phone or tablet and pushed that to the screen. The problem with this TV is its the only way to watch Netflix or really anything as the TV, because the TV has no tuner or built in apps. It really can't be called a TV.