I have that same screwdriver, WF AE. Yeah, WF means Western Forge. I believe the date code AE means mine was made in 2015. If I recall correctly AA was 2011, AB 2012, and so on, which I suppose would make your Z a 2010. The date codes on Craftsman hand tools didn't appear until around when Craftsman started offshoring production of some of their tool lines.
Anywho, I like the feel of the handle of the Craftsman and it works well, but I'm not a big fan of the bit storage where it has a few different positions you align with holes that blindly hold a bit. I guess you could get used to it after you memorize which bit is where. I never did as I never used it. Also, just like the GearWrench, the Craftsman has a direction selector that's the opposite of intuitive. You turn the selector towards the arrow to turn a fastener the opposite direction. The Snap-ons turn the fastener the same direction as the arrow the selector is pointing to.
The bit storage on the Snap-ons is better than the Gearwrench also, because the cap turns counter-clockwise to remove and clockwise to lock, like you'd expect, but the GearWrench turns either direction to lock, and you have to center it in between to remove, so it, like the directional selector, is something I find myself always turning the wrong way first. All that said, the GearWrench are good screwdrivers. I prefer the comfort grip handle, they have a finer tooth ratcheting mechanism, and the 3pc set with all the extra socket and bit shafts are a great value. I'm all the time using the GearWrench shafts in my Snap-on drivers. Just for them alone was well worth the price. I also have the full set of Gearwrench metric/sae nutdriver shafts too. That's another knock against the Craftsman as it doesn't have a removable/interchangeable shaft.
