RE: Nitro or Electric
if you compare say the firestorm flux vs the nitro then the flux should have better performance. electrics are higher up front cost due to the batteries but that evens out over time because the cost of nitro is so high right now.
Neither is better, some prefer one over the other for their own reasons. A lot have both, like me, and run both for different reasons.
With battery technology the way it is right now it's possible to get longer runs on a battery than a standard nitro, a 10,000 mah lipo will run for 45min (even if it does cost $200)