this is a easy choice
if u are a major area with alot of ppl (power goes out they are the first to get it back ....rich ppl..hospitals...gas stations....police stations/jails....person with medical condisitons)
then a electric unit would work for u as long as under 18 inch and not wet snow
if u are in a area where u are lower on the list or u get more then 18 inches at a time a gas powered one will do better for u
have used both in maryland ( the electrical one was fine for most of the storms untill about 5 years ago then it change the snow got deeper and wetter so had to move to a big boy snow blower with auto drive that could handle 24 inch of snow with a ice crust) ....my mother was medical and we had a dairy farm and several cops so our road was one of the first plowed by the state due to those factors