Both Wenger and Victorinox have some cool models and are of good quality. However, trustworthy SAK fans told me that Wenger's backsprings are weaker. I own half a dozen Wengers and have had no problems so far, but my Victorinox knives seem to have a stronger "snap", even after years of use.
For backpacking there are three kinds of SAKs that I love: the Victorinox Pioneer series, the Victorinox 111mm series and the Wenger 120mm series. Since you are carrying another pocket knife and are more interested in the tools than the blade, I think the perfect SAK for you would be the alox Farmer.
The Farmer, like all alox models, is sturdier than the traditional cellidor knives and packs all the tools you need outdoors. It has a main blade, a canopener with a small screwdriver, a caplifter with a larger screwdriver, a reamer (alox reamers are WAY better than the regular awls) and a woodsaw (which you'll find very useful).
As an all around EDC SAK that will serve you well in an urban or outdoors environment, the Victorinox Huntsman is hard to beat.