If you look at the pictures on f1racing, you can compare the 20 and the 21, and i have to say that except the nose, the 21 isn't even extremely different than his predecessor. The sidepods are lower ofcourse due to the v8, but the wings and flaps look like those on the mp4-20.
Anyway, imo the mp4-18,19 and 21 were/are ugly. :P On the whole, since the flaps and wings everywhere on the cars, most 21th century f1 cars aren't that beautiful anymore but that's off topic.