Hi Joe,
The extra armour was a surprise to me too, but now its not too hard to build a kit with it, because of the Dragon release of there Italian Panther with roof armour. I recommend if your going to pick up Panzerwrecks 5 and are interested in the "uparmoured" panther, Panzerwrecks 1 would be a worthwhile investment too as it has some more photos of the same Panther.
Regards
Matt