Enrons crimes were more legally dubious because they had followed accounting rules in a convoluted way. The end result wasn't legal, but the individual steps in isolation were arguable. So prosecutors had a daunting task. FTX seems to have flagrantly flaunted not just laws but even basic accounting.
Enron was a big hierarchy. Kind of like a mob trial, they got each lower level to turn on the next level. They had to prove the employees doing the actions weren't just rogues. Here, it's straight to SBF.
Skilling was smart enough to hide behind a lawyer and deny everything. SBF seems to be admitting to various aspects of the crime in conversations with journalists.
An added wrinkle is the Bahamas and the US (at least) want to try him. It might take time to figure out which tried him first. But I expect that's a fairly quick process.