ok so i just got my first pen style vaporizer (Ago G5). its pretty cheap, you can find for under 50$ so im not surprised of the following i noticed that it completely burns the weed, unlike the wall plug in vapes. after i look in the heating chamber, it has a bunch of burnt weed/residue inside it. so really its just efficient/convenient combustion with slightly less smell. so whats the difference between this and something that would just 'vape' the weed. as in have there just be slightly discolored weed remaining rather than ashes.