The numbers might be similar. If they were making the money off taxes though they would be screwing over a lot less people.My dad also told me (not sure if this is totally reliable though) that the reason why the government made weed illegal is because they make so much money from drug busts and fines that they would make less off of taxes? Not sure how reliable that is.
There's also a place in the United States known as Oaksterdam. It's in California and one educated man found all the loopholes in the system, and now the city Oaksterdam is located in is the easiest place to grow, smoke, and sell pot.
Oaksterdam is the perfect example of how legalization can revive an economy. The only reason the DEA hasn't went in there and busted everyone(they could if they wanted to) is because if they did the economy there would go straight to hell.