I'm not sure I can help you with the mechanics really, I havn't seen any comparison of mechanics so far. How ever, you can find a comparison regarding rules here:
http://www.fiba.com/asp_scripts/downMana.asp?fileID=518
And the fiba 2 and 3 referee manuals here:
2man
http://www.fiba.com/asp_scripts/downMana.asp?fileID=325
3man:
http://www.fiba.com/asp_scripts/downMana.asp?fileID=326
And if you look at fiba.com you can find several intresting downloads (look in the experts/referee section) including right and wrong questions and a few instructional videos. As well as several articles and stuff. The articles are also under "right and wrong" though, don't ask me why.
Good luck
