Gee, this is kinda like your Buck is better than Case thread over in the Traditional Forum.
Can you give us a picture of the Wenger scale chipping so we can get a better idea of what you're talking about? Hadn't heard that the Wenger blades chip easier than the Victorinox blades. Got any references for that? Pictures.
The only SAK I've ever chipped was an SI, and that was from dropping the blade on the bail. I have a number of Vics and Wengers, and no problems with any bladewise.
I've neither heard nor experienced any problems with the durability of the tools either.
Really the only major difference I can find is that Wenger's springs are a bit softer, and that's not a quality issue. Hell my Buck 301 has the softest springs of any knife I own, and I doubt you'd find anyone complaining about their quality.
I think we make a big deal on these forums about minor differences between knives and tools, and greatly exaggerate those differences. I mean how many "OMG Tru Sharp sucks" comments have I seen, and yet it holds a great edge and gets wicked sharp from my own experiences.