Fareast has written a quick comparison of DesktopBSD and PC-BSD on Dailykos.com:

After reading a very not-nice review of DesktopBSD a couple of weeks ago, and in light of the fact that I just adore PC-BSD, it’s a bit strange that I would be reviewing it here.

Still the hunger to try out some new and untried open source system got the better of me, and I downloaded the latest release 1.6, just to see what the deal really was. I installed the system under vmware-server, allotting 256M ram, and a bit over 2G hard drive space, just to make things more interesting.

The idea behind DesktopBSD is the same as that of PC-BSD; to make an easily installable version of the FreeBSD open source operating system through a graphical interface, coupled with a nice shiny front end to run it all on. This is significant because FreeBSD, while not that difficult to get up and running, is a considerable time hog when you want to get a modern day window manager running on it, i.e., downloading and compiling KDE from source (a huge package), with a conservative estimate being anywhere from fifteen to twenty hours just for that alone.

I have to admit that by setting up the specs so tough, that I kind of wanted DesktopBSD to choke; I’m really into the way that PC-BSD has their pbi directory set up with the install wizards, plus the ability to use the traditional ports method of FreeBSD to update your system, that I didn’t want to see anything endangering that crown.

Sadly, I was let down. If anything, DesktopBSD is easier and faster to setup than PC-BSD, and the speed that it showed with so little ram was nothing less than astonishing. I pulled up Firefox, surfed over to youtube and Flash was working out of the box; opened up a BBC news story and scrolled around, and it was very smooth.

One thing sorely lacking in the install were any office suite apps of note–no open office, no abiword or gnumeric or really anything; considering that DesktopBSD is just FreeBSD with the nice desktop, and no pbi directory like PC-BSD, means that if you want open office you need to compile it from source, just like in a normal,vanilla FreeBSD.

Does the system have the ability to do what I want it to do without a huge amount of effort, those things being: playing music, surfing the web (Flash included), using email, watching vids, and a bit of eye-candy thrown in, or at least some of the shiny on a slower machine? If the answer is yes to those simple requirements, then we have a winner, and a system that I want to install to my machine. Joe Sixpack/Average User can use Windows Vista if that is what is best for him, and I’m none the worse for wear.

And PC-BSD, with the ability to do both the traditional compile from source, as well as offering the packages through their nifty pbi directory has DesktopBSD beat in this category. Make no mistake, DesktopBSD is an excellent system that offers all the strength and flexibility of a vanilla FreeBSD setup with a huge time savings, it’s just that PC-BSD is that brilliant, and in comparison, there simply is none.

Read the full review here. Bold by me.

There’s more detailed information on the differences and similarities between PC-BSD and DesktopBSD on the FBSD Projects Page.