Speaking as some one who own's both a TTi and a Swisstool:
The TTi is a better everyday choice provided you need one handed access and the ability to clip it into a pocket. Build quality is upper end reasonable.

If you want a tool that will last forever, is extremely corrosion resistant and you can live without one handed access to blades etc then the Swisstool is the way to go. If there is one reservation I have about the Swisstool it is the way tool are locked. It does not "feel" as solid as the TTi. Which is ironic because in terms of build quality the Swisstool is far superior to the TTi.

The one handed access was a big deal for me. I really hate things on my belt, so it was "a leatherman type tool, or a knife", with the knife being the default, and the most important function on the multi-tool

I did NOT get to buy a Ti - the 154CM blade wasn't enough incentive to upgrade from my existing leathermen (yes I had plenty) but I did use a friends Ti for a week.

When the TTi came out, I decided "what the heck, I'll give another one a try" That and the fact that I was threated with arrest for carrying a Leek ("That's a switchblade" - yeah I know that it isn't, the courts know it isn't, but it's not fun having to prove it in a court of law), so I was looking for "yet another knife"

The TTi was the first multitool that was "good enough" to displace my folder to a backpack. The file on mine stinks - it was miscut, and they have offered to replace it, but I've seen ones that are cut RIGHT, and they still are not very good

If and when I get a surface grinder (on my wish list), I may take a gobert flat file and grind it down in thickness, and shape it to replace the existing file. I did ask Leatherman about "do a super tool with a real file, a real blade, say D2, etc etc" and their comment was that there would NOT be enough of a market, that the lack of rust resistance would be a deal breaker

Addendum:

Sorry, I forgot to mention that paper and cardboard will blunt just about anything. Its actually as abrasive as a very fine sandpaper.

You can actually strop a knife on cardboard as you would a leather belt. It's also an effective way of getting gunk off the blade.

Yes, but what I was trying to say was the leek held a razor "slice open the envelope" edge about 2-3 times longer than the blade on the leatherman. I know how abrasive paper/cardboard is - I probably own 30-40 knives, a few cheap ones, a few real high end "true" customs (made to order to my design) and everything in between.