1. Symbian is the latest OS where as j2me and Brew OSs are old ones.
2. Symbian OS has SIS file format where as j2me has JAR file format which means this is a third party software and anybody can develop softwares in this OS.
3. Symbian is a fast browsing and a fast operating system. j2me is not as fast.
4. Symbian OS provide touchscreen phones such as UIQ phones. No such facility on j2me.
5. Symbain OS has superior hardware access to the phone compared to j2me and Brew OS
6. Symbian OS offers rich UI.
