Rampage is worse. It isn't even close. You really think trying to cash in is worse than possibly killing people or an officer? Jackson was driving down the wrong side of the road while being chased by cops!
This is the same logic people who drive drunk use. If they didn't hurt anyone it isn't that bad. Well obviously! But the act itself could have killed someone.
That's not really fair, Rampage was mentally ill and that incident was entirely out of his control. He suffered from some sort of psychosis induced from sleep deprivation and abuse of energy drinks. What happened with him was completely different from driving drunk.