When comparing the cost of buying/using an electric vs. a nitro, make sure to include the cost of the nitro fuel. It can add up in a hurry.

Electric is much quieter than nitro, and less messy. With electric, most of what you hear is gear against gear noise, and rotor against air noise. With nitro, you have all that plus engine noise.

Nitro usually gives longer flight times than electric, depending on fuel tank size vs. battery size.

Nitro engines require break-in and routine adjustments, brushless motors require neither.