Hi Olivia,
Seroquel and Zyprexa are both antipsychotics, and yes, as you say, similar but different! :)
The only info I know on side effects of these is from their websites -- Zyprexa side effects info can be viewed at http://www.zyprexa.com/patient/sideeffects.jsp
As always, you might be lucky and escape with very little in the way of side effects (or with very short-term ones early in your treatment). I hope so!!
Sorry, that's all I got! -- Keep us posted on it!
Rosie x