Interface is different, and 3D is absolutely real. Each unit comes with a leader, and if the leader's cool, the unit can do more things in a turn. If a leader matches a unit type and is also with some experience, he can do some advanced veteran stuff, i.e., the Junkers can become "buker killer" for one turn, tanks can put "hull down" and increase defense from backfire while attacking, units can entrench, camouflage, infiltrate. Artillery can "plot artillery" and fire more accurately while in support fire phase, bombers can "fly in the clouds" and figters won't see them unless next to them etc., I bet I haven't seen them all yet.
Generally, that's the same good PG, but it looks nicer and has more "features". I like, as I mentioned, the ability to promote and decorate leaders (campaign mode), thus focusing strength on units that you need most.
I also found it less biased towards Germans - i'ts less easy killing French! OUTRAGEOUS!!!
General view - buy it, but be careful - it's a big muthafuka, so check your sys capacity first.
Which marriage message, the Wife 1.0 or Black-Scholes?
