I've never bought a Wenger although I am fairly certain they are well made and a fine knife. I bought my Victorinox Boyscout Huntsman about 15 years ago and, with few exceptions (like today), it has been with me ever since. I experimented a while back with using a Victorinox Tinker as an EDC but it was too light laugh and was misplaced so now I'm back to the Huntsman. I think it just depends on which model you start with as to which you like best. Some of the tools are made slightly different on the Wenger as opposed to the Victorinox (I am thinking in particular of the can opener). I started with Victorinox and am familiar and comfortable with it's tools and if I buy another it will likely be another Victorinox. It's familiarity, though, not quality or other variables, that drives that decision. Quality is about the same but as I said I am more familiar with the Victorinox.
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Uh ... does anyone have a match?