thats a tricky one. of the line, the electric. electrics dont have to build up RPMs to make power.
top speed..............might go to the nitro(if properly tuned) but that is the case with the stock battery that is included with the volcano. if down the road you choose to go lipo(a 2s lipo and charger off ebay will run you $70) then it would be the electric. brushless sytems are crazy fast today! they have crazy torque. the only thing you are giving up by going electic is smoke-noise and tuning. also, a $30 battery will last you a few years. a $30 gallon of fuel may only last a couple of months.

watch this, and youll want it! notice he hardly ever even uses full throttle!: http://www.youtube.com/watch?v=JzGn-jL6YXQ