Anyone using QBO for both residential and commercial construction? How do you keep them separate?

Some construction businesses work across both residential and commercial projects — and the two can be quite different in terms of contract terms, billing cycles, tax treatment, and the level of documentation required.

If that sounds like your business, how do you keep the two streams separate and reportable in QBO? Are you using Classes to separate residential vs commercial? Different customers/projects? Or do you keep them in separate QBO files altogether?

Would love to hear what's working — and whether QBO gives you the visibility you need across both sides of the business.