Hello . I cant choose between Sony KDL40WE660 40" vs LG 43UH603V UHD 43" SMART TV 4K vs samsung UE40KU6000WXXH UHD 40" . The lg and samsung are 4k but the sony is 1080p . Does that mean that for example the sony one is going to have better color density since the others are considers cheap in price uhd tvs? They all cost about the same : 470 euros