Stealth is also a pretty small launch coaster when you compare it to Top Thrill and Ka. For me Stealth doesn't even come close to Top Thrill (still have to ride Ka). and I'm not too into the one-trick-ponies.
^I guess it varies among people, but to me there's a huge difference between the launches of Stealth and Rita! To me Rita has a good launch, but it's a little bit too short and not powerful enough to give me the buzz that Stealth delievers. Stealth on the other hand lasts a little bit longer and the extra powerful launch gives me a great buzz!
Stealth is probably the most awsome coaster I have ever been on, but not the best.
I can't say anything in the difference in the launch, compared to Rita. But compared to Kanonen and Speed Monster I could feel a big big difference. I alomost blacked out trying to keep my hands up the whole launch.