I've hit Hogans all my life--learned on the blades in my 20's, now into my 60's. My latest Hogans were Apex pluses. I hit the Z's just to see what they were like and was converted, mainly due to feel through the hitting area. The Z's felt a little crisper, yet were still buttery-smooth like I've been used to with the Hogans. Hard to describe, but I just liked the feel a little better. I also think the top line is thinner (though not by much) and the offset less, which I like. After playing with them awhile, I see the following differences:
1, Z's go a little higher, but also a little longer when pured.
2. You can work the Z's a little easier (fades, draws, trouble shots)
All-in-all, I think I like the Z's just a little better than the Hogans, but not by a lot. One thing that I fear with Hogan being moved to the Callaway iron works is that they will lose their quality and craftsmanship since many of the artisans have elected to stay in Ft. Worth. Hope it ain't so, but logic says it will be that way.