First off, power is not really the right measurement for the limit of engine components. Torque is the better unit to consider.
The VE has higher compression, and I believe thinner rods, possibly also the piston rings are closer together? This all works against you for boost.
Most people consider ~450 ft·lbs as the limit on a stock DET, and ~400 ft·lbs for a DE+T, and then ~325 ft·lbs for the VE I think.
How much power you make with that is all down to how high you're willing to rev the engine.