To each their own. I admire the fit and finish on the better Wusthof's -- which is as good as any mass produced knife I've ever seen, and better than most. I like their handles too. But at the end of the day it's a heavy knife with an awkward shape, that takes an edge with some difficulty and loses it comparatively quickly.
The comment about soft steel is interesting, in that the softest MACs, the Original and Chef's series, have a Rockwell hardness of 58, the same as the hardest Wusties (LCB, and Ikon) made from the European steel X50CrMoV. They are harder than Wusthof Classic or Culinair (56 - 57) which are made from X45CrMoV. Of course, the low end MAC's are made thinner and so may (or may not) wear quicker, but they are so much cheaper than the top of the line Wusthofs.
Although I've handled and sharpened a few, I've never owned a low end MAC, or talked about longevity with anyone who has worked with one. My experience with them is they hold an edge much better than any X45CrMoV knife, and need less frequent sharpening. I'm surprised to hear that you're getting significantly more longevity out of your Wusties. I've got a little more experience with the MAC Professional line, which has a Rockwell hardness of 60. As far as I know, they don't wear quickly at all -- in fact slower than any mass produced European knife, and properly sharpened and maintained, they hold an edge far longer than the Euros. These knives are heavier than the cheaper, stamped MACs; but they're feathers compared to any Wustie, even an LCB.
I know a lot of pros who could wear down anything in a year because of how and how often they sharpen. For instance some use diamond steels several times a day and others don't steel at all, but go straight to an India stone. Still, I'm surprised you're wearing MACs so much quicker than Wusthofs. I'd be interested to know how and how often you sharpen, and how, how often, and with what you steel.
Rate of wear may be very important to you, it's certainly a valid consideration. My priorities are shape, edge taking, balance point, handle comfort, weight and edge holding. Given that there are a wide variety of French profile knives (including nearly all Japanese cook's knives), better able to take a sharp edge, appropriately balanced, as comfortable and significantly lighter than any Wusthof -- that pretty much leaves Wusthof out. (Although, of all the mass produced German profiles, I think the Wusthof LCB is one of the very best, and Ikon ain't too shabby either. Credit where credit is due.)
I don't have any brand loyalty to MAC. All of the knives in my block and on my bar -- except for the bread knife and my wife's paring knife -- are carbon Sabatiers of some vintage. Which, by the way, I wouldn't recommend to anyone who wasn't already a carbon convert or darn near. However, I have and do handle a lot of knives and think that, according to my criteria anyway, MAC is a lot of bang for the buck for both the pro and the home cook.
BDL