Victorinox SwissTool. Almost indestructible, will not rust, external access to all tools, etc., etc.
Due to super blowout prices, a Swisstool came to hand and later, a Leatherman Core. My intention was to alternate their use, keep the better and sell off the other. As it worked out, I wouldn't want to part with either.
While I admire the Swisstool design and build quality, IMHO the Core works better as a multi-tool. Each has its own character, both are well enough made and require minimal care. For occasional use, either will do. I have used both and prefer whichever is in my hand at the moment.
Where it matters is when the tool has to come out often in a day's work. Although Swisstool implements are supposedly more convenient outside the handle, I find it takes more care and attention to work the nail nick against strong backspring pressure. It also tears up my thumbnail. Opening implements on the Core is much easier. I can even lift out the knives and saw blades with the flat of my thumb without taking off my work glove. For frequent use, I think the Core has it all over the Swisstool.
Don't misunderstand, I am a huge fan of Vic products. At the moment I am totally seduced by a Spirit, my EDC for weeks. For all around casual use, this is as good as it gets. However, when I expect to do serious work, the Core takes a ride. For a work site tool, Leatherman really got it right.