My experience is that ebony is s-m-o-o-t-h and if you're rattling up and down the fingerboard that's some advantage. So, IMHO, ebony is
faster. Not that I'm a virtuoso but I get beyond the 5th fret sometimes (nosebleeds permitting).
I couldn't really say if there's a difference in tone (compared to rosewood - or maple, for that matter
). I'd have to change 'boards on my guitar to find out - hoping I could remember the sound of the original by the time I'm swapped it out. What with the measuring and clamps and chisels and glue and shavings and all the hassle... frankly I can't be assed.
Looks? Oak is pretty neat...