Putting drywall on studs, I can add switches and outlets using New Work boxes that stick out from the studs or I can use a plain junction box and add mud rings. Are there any pros or cons?
For me, the biggest difference would be that with New Work boxes I'd have to develop the skill to accurately cut drywall to fit. I know of several techniques but they all require practice and experience. Cutting it after installation from inside a plain junction box seems easier.