I own about 5 Wengers, compared to a whole thundering herd of Victorinoxes.
I prefer the look and feel of Victorinox, but Wenger also makes a very good knife, just not quite as good as Vic.  
One thing I notice on the standard Wenger models is the protuberance holding the key ring is a bit too priminent, and may cause more pocket wear than the equivalent Victorinox models.  
The standard-sized Wenger models are about 1/4" shorter than the standard V-nox.  V-nox's can opener is superior, and the large knife blades seem a bit sturdier than on the Wengers.  Both Wenger and V-nox's blades take a good edge and cut very well.  V-nox has better finish on their blades.  The V-nox scissors might have a weaker spring, but are better at precise cutting than Wenger's.  And generally V-nox knives walk and talk (snap open and shut) stronger than Wenger.
I like some Wenger models (I've been looking for their version of the Soldier because it has a bale loop not present on the V-nox version I own).  However, I consider myself a Victorinox man.
Jim