Been doing research on looking at new tv,s. Ilooking at 2 tv models of LG nano cell tvs. What is the difference of a nano led and a regular led? The cheaper model is SM8600PUA and is edge lit. The other model is SM9000PUA which is backlight led. I am interested in either a 65 inch or a 75 inch. Havn,t seen any evaluations of either model. I did find that the model numbers that have an s in the model are higher grade than the models that do not . BestBuy has this mode 24 months without interest now and the prices have dropped more this week.