I do like the look of those better but just a few things turned me away and to the mx4. Bunch of reviews said the top scratches easily and the back section only opens and locks at an upright position while the mx4 can lean against the back of the truck(on the rubber blocks) and lock down in that position and different angles.
That's why it's cool to have choices, plus folks chiming in on their expectations and experiences. I did not want one that folded against my rear window, so the quick remove option was important to me. I've not had any scratching, but I don't put stuff on top of my cover either.
Word of caution for Lomax users > That aluminum gets hot in the sun. I live in Houston, TX ... But this applies anywhere. In that moment you decide to quickly remove the cover on a sunny day, consider gloves or hand towels. I like to think I'm as tough as the next guy, but still.