I could say that Weezer (mostly) lacks Folds' pretentiousness; the latter sounds like he's so full of his own shit even in the more lighthearted, "funny" songs. Rivers Cuomo, even when Weezer could still lay claim to being a good band, knows what it's like to have his head up his ass—see "Only in Dreams" or "Butterfly," though preferably not both—but, save those moments, Weezer circa the first two albums never came off so self-important.*
*I should add here that I am well aware that the bulk of reviews that greeted Pinkerton upon its release felt just the opposite, raking across the coals an album full of ugly self-loathing and a notable lack of sing-a-long melodies. Given the critical revisionism that occured around the dawn of this century, time has been kind to this album, though any accusations of pretension to this day are not without merit. To that, I'd say the songs on Pinkerton avoid the usual "I hate myself and no one loves me" cliches and are a bit more like pulling on that loose bit of hangnail and stripping the skin down the length of your finger.