The Manjaro developers have done a fantastic job of making Xfce, GNOME, and KDE versions look and feel the same.
You might want to compare the SHA256 checksum or the MD5 checksum to verify the integrity of downloaded packages.
You are free to choose your kernel(s), drivers, desktop environment (or none) and any other packages and you will have many more and very detailed ways of configuring the target install to your liking.
Beyond Manjaro's ability to make Arch easy, one of the most impressive aspects to be found on this desktop Linux distribution is the collection of included software.
The 64 bit version of Manjaro with the Xfce desktop, boots up in only a few seconds and uses only 200MB of memory to run.
Once all our packages have been installed successfully, Manjaro's hardware detection tool mhwd will install needed network drivers automatically.
Hopefully when it get fixed the new version gets loaded auto so I do not have to download the iso again.
If the Manjaro system you are installig right now is the only one or if you use a custom GRUB configuration, GRUB alone will do.
If you're looking at RPM suffixes, as long as you have a Pentium II or later, packages with i686 in the name should be okay, but picking i386 packages to be on the safe side can't hurt.
With the KDE and GNOME flavors of Manjaro, you work with the standard tools of that particular desktop environment, for a bit more cohesive feel.
For example, the KDE version of Manjaro will lean heavy on KDE applications and the GNOME version will lean on GNOME software.
