Apologies for making this seem difficult! Actually, the hardest part of the process (and explained in the article) is compiling the mod_jk.so module itself. (The Apple article included a link to a compiled binary, which I hoped to do as well.)
For simple situations, either or should work just fine. However, as stated by the developers, there are often situations where you would like a choice. (The connector architectures are really a deep, dark corner of the Tomcat project.) A full, thorough discussion was presented to the Tomcat-dev list here: http://firstname.lastname@example.org/msg26335.html
As everyone will point out, choose which approach will work best for you, and test, test, test.