One of the major differences between typical residential mortgages and typical commercial mortgages is:

		Commercial mortgages usually restrict prepayment or have some sort of prepayment penalty/fee, whereas residential mortgages usually do not restrict prepayment.
		Commercial mortgages are never done for a 30 year term whereas this is typical in residential
		Only residential mortgages are secured by the property itself
		Commercial mortgages are interest only and residential mortgages are amortizing.