Well, I have the Swisstool and the Charge Ti, and I did a side-by-side comparison. Take my observations with a grain of salt, knowing they're unscientific.
Robustness (is that a word?): I've got to give this to the ST, however, I do so with the observation that the ST pliers are significantly thicker and don't have a true needlenose tip, so I would expect them to be stronger. It's tough for me to compare handles, because I don't know how to compare titanium to steel. The Charge is certainly lighter and smaller. I can also flex the handles of the ST when squeezing them more than I can the Charge--maybe that's because I can get more leverage due to the ST's longer length.
Blades and files: The Charge wins walking away. The PE and serrated blades are superior to the ST, as are the saw blade and the file. Who can hate 154CM and diamonds? And the clincher is the one-handed opening capability of both blades.
Drivers and scissors: Tough to compare the ST screwdrivers with the Charge. I think the Charge bits may be tougher to round off or twist, but the bit holder isn't as strong as a one-piece driver. And, the drivers on the ST can reach further. The Charge scissors appear to me to be superior in both cutting ability and durability (they don't have that little leaf spring).
Wire cutters: The Charge has wider cutters, but I don't know if they're tougher.
Fit and finish: I think comparing polished steel to titanium is apples and oranges. I will note that the Charge allows me to grip the handles and use the knife with a much less slick surface than the ST--in fact, I can envision my hand sliding right down the ST handles and across the knive blade. I understand this is negated with ST with the black anodized finish.
My overall opinion? If you want great pliers and drivers with good knives, get the ST. If you want great blades and files with good pliers and drivers, get the Charge. If one-handed opening is the ticket, get the Charge.
Here's my ideal multitool: The plier strength of the ST with a true needlenose, the compound leverage of the SOG, the wire cutters of the Gerber (replaceable carbide), the one-handed blade opening and titanium handles of the Charge, the knife steel and file quality of the Charge, and the configuration of the Surge (love those big scissors). It would be all right to keep the bit holder but offer an option to use longer bits and make the holder itself out of a super-strong material. Get rid of the tiny screwdriver and replace it with an awl.
Don't want much, do I?
