Of the new Wave and the SwissTool - the CLEAR choice is the Swisstool.
I own a new Wave and only bought it since I have a custom holster for a Wave and this one fit.
The old wave had a better selection of tools. The new wave only comes with ONE bit, and that is the one in the tool. Since they have that useless eyeglasses screwdriver in the tool, they waste a bit slot. So, as bought, the new Wave has less blades than the old one.
To make that better, you need to buy the bit kit from Leatherman for $20. I have one, and they make the new Wave very versatile. However, the cost of the new Wave plus the bit kit is about the same price as the charge - with which you get extra bits (but not as many as the bit kit). So, IMHO, the new Wave is not a good value.
If you are going to EDC one tool of the ones you mention, the SwissTool is far and away the better choice.
For reference, I have a SwissTool RS, an old Wave, a new Wave, a Charge Ti and Charge XTi. I use the Swisstool as my favorite and the only thing I don't like about it is that it doesn't have a one handed opening blade. Other than that, it is far and away the best of my multitools.
J