There didn’t seem to be much difference between the Panzergrenadier and armoured infantryman when it comes to equipment and armoured fighting vehicle. There were some differences in replacement policy but those went for the armies as a whole and didn’t affect tactical and operational employment. Zaloga refers to a German preference for attacking mounted in their AFVs, but that is not what happens in the examples, so we don’t have any idea how that plays out.
Armoured divisions on both sides suffered when defending because they had a smaller infantry complement than an infantry division. And while the Americans had the luxury of being on the strategic offensive and thus only having to defend occasionally, the German army by the end of the war had to plug gaps with whatever came to hand, thus putting the armoured divisions at a disadvantage.
Apart from an offensive or defensive stance the determining factor in the outcome of this match up was that the Americans had much more stuff and were better at coordinating them. So while the Germans even struggled to get artillery support for their attacks, the Americans could pour artillery on enemy attacks, supplemented with air attacks when the weather was good.
My main problem with the book is that the combat narratives, and especially the last one, are not that clear and are badly supported by the maps. Especially in the last case it is hard to figure where the combat is taking place to St Vith and other places which are constantly referred to in the text. To sum up: I lost interest at some point.