I was wondering if the user interface with webos and the picture quality on lg TVs are as good as Samsung’s.
While I don't know about PQ in regard to the two particular models you're comparing, I will say that I vastly prefer LG's OS over Samsung's Tizen. When it comes to smart TVs, the following is my own personal hierarchy:
Sony (Android) > TCL (Roku) > LG (WebOS) > Vizio (SmartCast) > Samsung (Tizen),
although Sony and TCL are darn near a tossup for me depending on the usage. For a guest room? I'd go Roku every time (thus TCL). For my main TV, I really enjoy Android. Samsung consistently rings dead last for me and I have worked with hundreds of them as an A/V tech. Everybody has different preferences though, so don't take my word as gospel. You might like any of those more than another. It's just my personal take on them.