Not all sugar is actually processed by the body the same though.

Fructose gets processed in the liver whereas glucose goes into the blood stream triggering insulin response.

Other very fine points are glycemic index, for example a low glycemic index food breakdown to glucose, bypassing the liver, but is absorbed into the bloodstream relatively slowly for glucose and minimizes the insulin spike/response promoting more stable blood sugar levels.

Yes that's definitely true I meant they will end up as the same end result. The fast sugars will end up causing you want more of it again in a shorter amount of time so it is ofcourse better to eat veggies instead of a candy bar to get your required energy.

And thats the problem. Insulin spikes are bad for you.

That's only half the story. Simplest sugars (monosacchrides like fructose) get absorbed almost instantly in your stomach/instentine while more complex sugars/carbs (disacchrides and starches) get finally broken down and absorbed further down your intestine. This can have a dramatic impact on your biome.