This is the current(30/5/2010) version of Ubuntu (Gnome) 10.04.

1. Installation was easy and straightforward, took less than 30 minutes.
2. Upgrade can take several hours, potential warning messages pause upgrade, so it must be monitored to avoid wasting time
3. Best to wait several days after issue, as bugs are often fixed in the first week.
4. Relatively low footprint compared to Windows; a Vista-compatible system will have a scorching performance in comparison.
5. One bug - if you use a resource-intensive screensaver, X sometimes crashes after extended periods. I keep it light.
6. Long Term Support means it will be supported for 5 years, and directly upgradeable to 12.04 in the future.
7. Comes with Open Office.
8. Network printing via CUPS is the easiest of all I've tested to set up, including and especially Windows. Just click the right buttons.
9. Hardware (currently): Core Duo 2.5 GHz each, 2 GB Ram, 320 GB HDD(SATA).
10. Webcams work. With this hardware even Cheese can record video. Soon to be assisted(hopefully) by the planned PiTiVi Video Editor recording option.

This is the current version of Fedora, an Open Source implementation from Red Hat.

1. Installation was as easy as Ubuntu and as quick.
2. Most of what the typical user will need (wireless, internet, email) will work straight away.
3. It doesn't come with Open Office.
4. It doesn't come with mp3 support. These both have to be added after modifying the software source repositories.
5. Repository modification harder than Ubuntu.
6. Depends on RPG modules not DEB.
7. Installs via both YAM and APT.
8. Online support is comparatively rare and often alpha-geeky.
9. Personally, not an easy system to modify.
10. Difficult to detect on a network, even harder to share with.
11. Can 'see' Ubuntu shares, however.
12. Unusually large footprint, 50GB 'root' partition out of a 250GB HDD.
13. Familiarity in the Gnome desktop, similarities with Ubuntu 8.04-10.04.
14. My installation disintegrated after four days, lost the volume control icon and could not detect any sound hardware.
15. Every boot up generated a 'kernel crash' error report. Never seen one before anywhere.
16. At boot-up, much frustration due to Username being displayed long before the machine was ready to allow login. A practical freeze-up.
17. Shutdown is in two stages; you have to logout to get to a page where you can shut down. Spammy.
18. Network printing with CUPS is trouble-free.
19. Webcams appear to work, but my test hardware has never been able to support Cheese video recording. No change there.
20. Hardware spec: P4 2.36 GHz, 1.5 GB Ram, 250 GB PATA HDD.