Sugar in fruit tends to be less of a problem than sugar in candy because its glycemic index is lower. In other words it takes the body longer to convert it into glucose, the stuff that actually fuels the body. That means fewer issues with wild fluctuations in your blood sugar and less strain on the pancreas since it doesn't have to create as much insulin to manage blood sugar spikes. It also means less sugar gets converted into fat when it can't be used as energy immediately.

In general though less sugar is better regardless of the source. That includes pretty much all carbs. Low carb, high protein, and high fat diets tend to be best. It turns out the fat => high cholesterol => heart disease claim is bullshit pushed by a hack doctor and government agencies that had a financial interest in selling more grain. Sugar is the real problem. I'm personally starting the carnivore diet when the semester ends. I saw amazing results in just a few weeks last time I did it. The only reason I stopped was because the transition can be tough on your cognitive abilities and I had midterms that I needed to ace.