Far worse. Coming off Klonopin was easier than Seroquel. It's so tricky and devious that most people (myself included) have no withdrawal until they're completely off of it. All I got from seroquel was 50 pounds of fat, damaged cholesterol, restless legs, infected head acne that required a trip to the hospital more than once. And it didn't even put me to sleep! It was unethically prescribed off-label and all it did was make me worse. Astra Seneca paid millions of dollars in fines for this exact reason:

"In April 2010, the U. S. Department of Justice fined Astra-Zeneca $520 million for the company's aggressive marketing of Seroquel for off-label uses. According to the Department of Justice, "the company recruited doctors to serve as authors of articles that were ghostwritten by medical literature companies and about studies the doctors in question did not conduct."