root@kali:~/Desktop/ndiff-bug# cat base.xml
<nmaprun>
<host>
        <status reason="echo-reply" reason_ttl="127" state="up" />
        <address addr="8.8.8.8" addrtype="ipv4" />
        <hostnames>
                <hostname name="ns1.google.com" type="PTR" />
        </hostnames>
        <times rttvar="5000" srtt="1610" to="50000" />
</host>
<host>
        <status state="up" reason="echo-reply" reason_ttl="127"/>
        <address addr="8.8.8.8" addrtype="ipv4"/>
        <hostnames>
                <hostname name="ns2.google.com" type="PTR"/>
        </hostnames>
        <times srtt="2510" rttvar="5000" to="50000"/>
</host>
</nmaprun>
root@kali:~/Desktop/ndiff-bug# cat scan.xml
<nmaprun>
<host>
        <status state="up" reason="echo-reply" reason_ttl="127"/>
        <address addr="8.8.8.8" addrtype="ipv4"/>
        <hostnames>
                <hostname name="ns2.google.com" type="PTR"/>
        </hostnames>
        <times srtt="2510" rttvar="5000" to="50000"/>
</host>
</nmaprun>
root@kali:~/Desktop/ndiff-bug# ndiff base.xml scan.xml

-ns1.google.com (8.8.8.8):
+ns2.google.com (8.8.8.8):

-ns2.google.com (8.8.8.8):
-Host is up.