I'm growing both now, and the schrooms are a pain in the ass to me. The relatively strict humidity/temps/light levels to grow good schrooms seems to a problem to maintain.
I can grow herb in an environment that fluctuates between 40% to 80% humidity with a temp range from 78 to 90 degrees, and the plants will thrive
With schrooms the temp for success is between 78 and 82, with a humidity level of 80%, which can be a bitch to maintain in a grow chamber.
Plus the time isn't that much of difference, like from inoculation of the spores to harvest in a good environment it's about the same. It took me 45 days for the jars to fill out, and around 30 days more until harvest, plus drying. Herb is roughly 90 days, plus drying.