Over the past couple of years I have been buying a lot of knives and multitools and I have to say that Victorinox products are of exceptional quality...so much so that I am in the process of selling off all my non-Swiss knives and multitools because they seem so primative in comparison.
Dunno. A big fan of both Victorinox and Leatherman, I've been thinking about this for some time and find the issue not so clear. No question, Leathermen are "apparently" (of this more later) not up to the fit and finish of Vics. OTOH, as tools they may be equal or better. I own both a Core and Swisstool, comparable multi-tools and a good sample for comparison.
On the Core, I find implements easier to access, even with the flat of my thumb or with gloves on, and screwdrivers longer with a better non-slip fit in screw heads. Swisstool implements, although accessible without opening the pliers, require more attention to use the nail nicks, pulling them out against tension all the way. For occasional use, it doesn't much matter, but if the tool comes to hand often in a day, my thumb feels the effects of the Swisstool's tight fit. After many months of switching off, my conclusion is that Swisstool is the better product, Core is the better tool.
On the question of build quality, a certain level is necessary to ensure a tool is strong enough for the job. Beyond that has its benefits, such as the highly polished Vic finish which makes it so rust resistant, but there is a downside because it results in rounded screwdriver edges. All Leatheren I have owned have been up to all demands on them. That and the warranties for both are good enough for me.
BTW, although I am aware it happens, in ten years I have never broken (well, once, but it was my fault) nor had rust on any of my Leatherman tools.
Some models, like the Juice CS4, have no Vic counterparts. I wish there were, because I love Vic SAKs. In the old "which one would you keep" scenario, it would be a Swisschamp, followed by a very long period of remorse.