[jQuery] mouseover/mouseout vs. hover

[jQuery] mouseover/mouseout vs. hover


I'm new to jQuery and I have to say I love it! I hate javascript but
now I like it cuz of query. Anyways enough of that :)
I'm a CSS developer also. I know that the :hover pseudo element
doesn't work in IE 6 so I always have to use javascript using
mouseover/mouseout events.
My question is, in jQuery is hover using the CSS or using acting as a
backend mouseover event?
Final question... what should i use hover or mouseover... making sure
it works on IE7, Firefox and IE6.
Thanks!