This is knowledge that could potentially be helpful when deciding what to buy in a store.

They are both lemonade based drinks, and sprite has a crisper, stronger taste to it. Or does it? It could just be the branding that lures more people into buying sprite instead of 7up, the labelling and bottle is more appealing to buy. I did a test, with two cups of sprite and two cups of 7up, the person had to guess which two where sprite, and which two were 7up.

This was done with 5 people, and neither of them could tell which was sprite and which were 7up, proving that, for the people I tested at least, sprite and 7up taste the same.