On Jell-O (I'm dumb)

So the stores that I visit sell two versions of Jell-O. The sugar free-and the normal Jell-O. They are approximately the same in price. However, the unit price of one is FAR better than the other.

Sugar free:

Regular:

As far as I can tell they both taste EXACTLY the same. I just recently bought a bunch of regular Jell-O. The reason: cuz I was caught off guard by the unit price. I thought that it might make more Jell-O. They both make 500 mL of Jell-O. In reality, I was just paying for sugar filler.