I only know a bit more than nothing, but I'd wager anything industrial is considered more interesting. Single-family residential wiring, especially for new construction where there's nothing in the way, is so simple that even I, using just what I've learned being a homeowner, could meet code with it.
commercial sites are supposed to be good; I know a commercial electrician and he'd talk about the many tech company headquarters and new buildings he and his team would wire up and do all the equipment for. This includes outlets, infrastructure like AC and any special equipment like fire alarms smoke detectors, any everything in between. He'd say working for government jobs were too slow, they took forever to complete, it was always more lucrative to go for private industry large construction sites like new malls, big buildings with large square feet footprints. Basically commercial real estate stuff.
Commercial....wayyyyy different. Need to know a lot more. Employment sucks. I knew HVAC people and flooring people who had it made but they worked for themselves.
Talk to contractors in any city with a hardware startup scene and they absolutely are making a killing. Lots of 220V, 480V, miles of 120V. Transformers, machine hookups. You name it.
