Symbian OS phones are ... well, smartphones. They allow creation of highly advanced applications and give developers access to low level APIs which makes it possible for them to develop valuable applications for end-users. These phones also support Java.
Java phones have limited development opportunities and thus most of the applications that can be found for them are games. They are slower than the Symbian phones (this is obviously relative as a Java application that doesn't do much can be seen to be much faster than an overloaded Symbian one) and cheaper (well, they are dumb phones for unsophisticated users).
There are no viruses on Java phones but recent Symbian smartphones don't have that problem either.
Finally, comparing the two is like comparing a BMW with Tata Nano. A poor man would call the Nana a car, but really ...
Java phones have limited development opportunities and thus most of the applications that can be found for them are games. They are slower than the Symbian phones (this is obviously relative as a Java application that doesn't do much can be seen to be much faster than an overloaded Symbian one) and cheaper (well, they are dumb phones for unsophisticated users).
There are no viruses on Java phones but recent Symbian smartphones don't have that problem either.
Finally, comparing the two is like comparing a BMW with Tata Nano. A poor man would call the Nana a car, but really ...