but didnt feel much difference between windows n linux yet
SuSe is a very graphical distribution. It's normal not to see the difference if you don't dig into the system's internals. It's what SuSe wants, to be easier to use. You can either:
A) Dig into the system's internals on SUSE. This could be hard if you have no idea where to start.
B) Install a distribution that does not use the GUI as much. This will force you to dig into the system's internals (and may give you some interesting paths to follow...)
I suggest you keep SuSe for a month ot two, look through the directory structure, read man pages, and then decide on a distro.
Some interesting starting points:
Installing a web server, or ftp server
Installing a nameserver
Installing any server
Reading files in /etc
Browsing the directory structure
Reading an introduction to Linux book
Looking at the settings in YaSt