Well purely from the user-experience PoV the difference isn't that huge and I should know as I have been using both for sometime and they are nearly identical. So sure, not going to argument about whats on the hood as I don't know, but purely from what you can do and how stuff operates differences are barely noticeable.
Although this damn Snow Leopard sucks at opening the Scripts menu from the menu bar - takes like 30 seconds just to open the blast-thinged - god knows why it was fine when I bought the machine back in the Spring.