I've had both std and premium. Line-X offers, Std, Premium, Pro or whatever which is like for work trucks, and Platinum which is a mix of Pro and Premium. Premium was much nicer than the std in my experience, and it was like $150 more if I can recall, id go that or all out for platinum.
Do it From Factory, I've had from factory, Line-X (both premium and std), and drop-ins. Factory ones are by the far the best, Premium Line-X close second but makes 0 sense if ordering. Plus Line-X often spray over hooks and tie downs depending on location which is dumb.