My experience has been that when I was working regularly with tools as a mechanic, the only multi-tool I carried was a 4 bladed Kamp King that I had acquired as a 12 year old Boy Scout. With a shop and vehicle at my disposal loaded with every kind of tool, what more did I really need?
Eventually, my lifestyle changed and I was no longer in a tool rich environment, but even without occupational need for them, tools were still often necessary for the kind of little projects that come up in the day to day. That's when I realized the limitations of my scout knife and started getting interested in multi-tools with more capabilities.
If, however, you want to try out a multi-tool on the job, there is no substitute for mass; bigger is better. My top choice is the Leatherman Wave (or Charge, functionally the same), which you already have, or it's big brother, the Surge. Both have a compact, versatile bit system, and their one handed opening is a serious convenience, has almost spoiled me for anything else.
There is virtue in rugged simplicity, though, and that niche is occupied by the Leatherman Super Tool 300. Although the Swisstool is equally rugged, I work a lot with gloves on, and the ST 300 implements can be opened without removing them. Not so the Swisstool, which is nail nick opening only and good luck with that when your hands are cold and fingernails softened by wet. I have no experience with SOG. All of these can be found for well under $100.