Honestly, I doubt it's really any different than the other brands out there. There's no way there are 20 different companies producing this stuff; I'm sure there's only a few that are sending it out to all of these retailers with a different name on it.
I went with FatMat RattleTrap on all of my vehicles and have no complaints. As said in the Amazon review, make sure you heat this stuff up because that's what really makes it stick.
There's no need to completely cover everything unless you have some subwoofers that will rattle the sheet metal on your doors loose. Knock around on the sheet metal and find the spots that sound thinner than the rest. That's where you want the sound deadener.
I have most of the interior wrapped in one of my Rangers and do not recommend it because it SIGNIFICANTLY reduces outside noise. With the radio down, emergency vehicles sound like a distant hum until they are right next to me and even then, they're quiet.