It won't get you higher than a bong (in terms of the overall ceiling), but it will get you initially higher per unit weight than a bong will.

.2g can get me ripped in a vaporizer, but it takes longer to vaporize than smoke....in the time it takes me to vaporize two .2g bowls, I can smoke 5 bowls in a bong and get blown onto my ass.

The highs will be different too, but very similar. I enjoy them both, but most people I know say a vaporizer high feels more like medicine, feels "cleaner", or feels more natural, while smoking is more psychedelic or recreatiional.