To read about the differences I recommend this thread here:
http://forum.shrapnelgames.com/showt...ighlight=spwaw
Though SPWW2 and SPMBT have been updated with even more cool features since that thread.
There is some tactical help here:
http://www.theblitz.org/message_boar....php?tid=50259
There's also tactical help in the Game Guide.
cheers
Cross