(Here’s a study on the liver effects.)[https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6549781/]

It doesn’t specifically say that fructose has a worse effect on the liver than sucrose, but it does say that fructose is 2x sweeter than glucose, which makes it more addicting, which causes you to drink more because you crave it. So I went looking up sweetness scales and fructose is also sweeter than sucrose (which is still sweeter than glucose), sometimes by a significant margin.

So if both are bad on the liver, fructose could possibly be worse because of a higher level of addiction due to sweetness level, which causes you to consume more than you might with just sucrose.