How does Ubuntu compared to Debian on the server side, these days? Will the new FreeBSD kernel support get moved to Ubuntu? The admins I know doing this for big installs swear by FreeBSD. (I've only managed my own desktop for quite a few years and have no clue. No O/S flamewar, plz! :-) )

Edit: I went Ubuntu-only on my desk a few years ago, previously Debian-only (well, one computer still have a Debian partition too and I also have a Mac). I'm asking about servers.