Which has more solutes: Diet Coke or Coke

Hi! I'm doing an experiment in Biology, and I'd like to know whether Diet Coke or Coke has more solutes in it, so I can explain why the results turned out as they did. If someone could give me an answer, I'd really appreciate it! ;D
Thanks!

The coke would have more solutes in it because it contains sugar and the diet coke does not. This makes the coke more dense compared to the diet coke, which is why the coke sinks in water while the diet coke floats.