Bootstrap's styles are more polished and comprehensive than Foundation's. Foundation's CSS file is very well commented and half the size of Bootstrap's. Bootstr

Bootstrap's styles are more polished and comprehensive than Foundation's. Foundation's CSS file is very well commented and half the size of Bootstrap's. Bootstrap's modals work with IE8, with Foundation's modal I get an error. Foundation's Orbit JS slideshow is easy to implement, but seems a little buggy in FF. phpnode got it right - I'd be more inclined to use Bootstrap in cases for which I have no design, or a simple design with latitude for many elements. Client extranet, back-end utilities, etc.