On an LED backlit LCD, the image will be brighter and almost certainly sharper and more colorful... but the blacks will suffer. As might the viewing angles.

Remember with LCD that the type of panel type will completely change its viewing characteristics. A Samsung will have some kind of VA panel, which will have better blacks, but poor viewing angles. An IPS panel will have poor blacks, but good viewing angles. It's all a compromise.

Although I'm highly sensitive to flicker and even differing decay times (ie. on my Pioneer plasma I can see the different decay times of the phosphors on a black and white image as a trail of green following bright white objects), I have *never* been bothered by any kind of LCD smearing, even on old panels. But all modern LCDs have ways to mitigate that anyways.

Too bad, you're about 0.5-1.0" too small for one of the 49" 4k panels.