5
Differences...
There are numerous differences at the code level as well as the interface level. At this point, I personally do not recommend upgrading beyond 2.0.13.2 unless there are modules that you need that are only available for 2.2.3. 2.0.13.2 is stable and more modules work with it. 2.2.3 is still a very young branch is is undergoing a lot of development. When 2.4 comes out, it will combine the best of both... The stability of 2.0.13.2 with the enhancements of 2.2.3.
For a list of modules that work with 2.2.3, search the forums. This topic has been brought up several times.
Hope this helps.
James
Insanity can be defined as "doing the same thing over and over and expecting different results."
Stupidity is not a crime. Therefore, you are free to go.