hmmm here is the deal

if you maintain and look after a dseries turbo just as well as a dohc vtec.. i mean good fuel, good oil and regular changes, warm up warm down etc etc.. your dseries turbo will last just as long and go just as hard as your dohc vtec...

however!

if you treat your dseries turbo like shit and a dohc vtec like shit, crap fuel and oil, no serviceing, no warm up/down time, thrashing the car out of its limits... the dseries turbo wouldnt last as long as the dohc... ie it would fail quicker

IMO!