Getting back to your question, Kevin, I seriously doubt you'll find you need anything anymore revolutionary than good habits to set yourself apart from the pack.
Deliver on your promises. Obviously, I'm partial to VLM. It's what I learned, it's all I've ever done. Had I started out differently I'd probably be partial to HWE. If we leave somebody thrilled it's not so much the process, because I think most will perform equally well, it's because we probably exceeded their expectations.
VLM is well suited for commercial work. Less noise, no open doors, no special parking requirements, fewer problems with wicking, fast dry times, no big hoses for people to trip over, yada, yada, yada, all things you can play up to your advantage. In the end, though, if you show up on time, remember who the guest is, do what they asked you to do the first time, rush back and fix whatever isn't right, get their carpet back into service in a reasonable time, don't do things that make you a bigger inconvenience than the dirty carpets, all the stuff you'd expect from a cleaner, then what method you use is often six of one, a half-dozen of the other.