Commercially, DE is better than CMH. Lower start up cost. Higher yield per square foot.
Hobby wise, or small grows, CMH is better. It's the most energy efficient (Par-watts) on the market.
If you need to max out a yield in your space. DE. (Commercial)
If you want to be able to use all your space and have a power bill low enough to fly under the radar. CMH. (Home grows)