difference between dns in windows2000 & windows2003

We can rename or moved the domain name without rebulding in
windows 2003 server,but in windows 2000 server, we can't do
that.

Shadow copy feature available in windows2003 server but not
in windows2000 server.A new tools to recover files.

There are 220 new group polices are added in windows2003
server over windows2000 server.

In windows2000 server support maximum 10 users access shared
folders at a time through network, but windows2003 server no
limitation.

Windows 2003 server includes IIS in it.
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1.Windows 2003 can run 32 and 64 bit both but windows 2000
can run only 32.
2.Windows 2000 support NT 5 and 2003 support NT 6.
3.Kerbors security is high compare to window 2000.