Folks, do you remember that really important science class on that thing called the conservation of energy? Where would any additional energy come from?
No, the energy output would not change (the power generated - the energy transferred per time - would probably change but that isn't really all that relevant here, either).
The relevant physics concept you're looking for here is stress - the force per area.
The energy transferred wouldn't change but the potential stress capable of being exerted would increase as your energy ball transfers the same energy, which to a first approximation can be taken to correspond to the force exerted (assuming the distance you smash the thing over is the same), and therefore exerts the same corresponding force, over a smaller area.
Greater stress on an object does typically translate to more "damage," i.e. greater internal forces on the body under the load, so yes, it would result in a more 'destructive' attack as we would intuitively expect.
The trade-off is the force is more localised. Compare punching someone vs running into them or rugby tackling them and assume you exert the same force.
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