Ahh.. Dr Watson loves to show how much he knowes..
The diet cola is probably sweetened with a sugar substitue which is 200 times sweeter than normal sugar. If they changed amount to make it equivalent I don't know. I herd they put extra junk in the diet foots to make you want them more. I know that aspartame is made of aspargarine and some other amino acid. I think I spelled that first amino acid wrong. These are excititory amino acids, stimulating in nature.