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The only advantage a non-vtec motor has over a vtec motor is that it will be cheaper to build. People need to stop rambling with all this overlap garbage when they don't even understand it. The VTEC lobe cams in stock hondas have such a wide LSA and hardly any duration that any minute amount of overlap you get completely doesn't matter. Think about it for a second, if the cams had SO much overlap that you were loosing boost pressure from your turbo that keeps on pumping, the cams would bleed out all your cylinder pressure that can't be increased untill your motor is at the intake stroke. The turbo keeps on pumping, if any boost escapes out the exhaust the turbo is spinning more than fast enough @ 5500 RPM's to keep the cylinder pressure and power up. If this is not an issue on a N/A 10:1 motor, it's not an issue on a turbo motor.
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