Difference bteween SSRS 2005 and SSRS 2008

SSRS 2005:

• SSRS 2005 it depends on IIS.
• If you want to work with Chats, graphs we need to install separately. 
• It has limited exporting options.
• In SSRS 2005, it has Multiple service Architecture like Windows service and IIS Service.
• In SSRS 2005 we  do not have Look up function

SSRS 2008

• It does not depends on IIS and it comes up with built in Web server.
• Chats and Graphs all are inbuilt with SSRS 2008.
• In SSRS 2008, we have lot of exporting options, included MS word also.
• It has only single architecture like Windows Service.
• In SSRS 2008 we have Look Up function.