Ok I am going to chime in again:
Finding comparable FI and N/A engines is not exactly jusitfiable.
An N/A motor is built differently to be reliable than a F/I motor to be reliable.
I want to ask one simple question:
If forced induction was not as reliable as N/A, why would huge auto companies use F/I for their cars?
The answer is that with current technology, an F/I motor can last just as long as an N/A motor given comparable variables.