cwilbur: i was assuming the questioner was referring to a comparison between paid firefighters vs. cops. i think it goes without saying that a volunteer anything gets paid less than a paid anything.
anyway, i know this does not answer the question but one advantage of being a firefighter is that when they’re not out on a call (and most of the time they’re not out on a call) they are in the firehouse, and they eat, cook, sleep, work out, watch tv, and study. i know a retired fireman who studied to become a plumber while he was on the job, and when he retired, he became a plumber. i also know of a dentist who did the same thing (studied to become a dentist while on down time in firehouse).
to take a guess at answering the question, i know in westchester county, NY, they just did a study of the salaries of all the employees (www.lohud.com) and the highest paid spots in the county (with the most overtime, also) were corrections officers and cops. the highest paid person in the county was a C.O. Sargeant who between $120K salary and $120K overtime made almost a quarter of a million dollars in 2007. check it out on www.lohud.com.