One annoying thing about Zurb, it overrides the default styling of forms!

I find that really annoying because sometimes you want to use something like formtastic, which works by add a class name on the form element, but won't work because zurb has overridden the default style. Twitter bootstrap does not do this.

I love the grid layout on zurb. It stretches to fit the width for tablets and phones. With bootstrap, the stretching happens only on phones.

Good and bad on both frameworks.