Hello Guys,
Thanks cks3976.
Update: There is a tool called Design Compare in Allegro PCB Editor which compares the netlists as wells as parts and packages.
U need too have a .xml file of the layout in order to compare from which it extracts the netlist on its own and then allows us to compare with other netlist.
Procedure:
Open your schematic in Allegro Design Entry , Create a netlist with PCB Editor and Layout ....you ll get .dat files and .mnl file. Now in PCB Editor Import the .dat files by redirecting to the folder where those are saved. Now without doing anything just save it as.brd file and then open your .brd file again in PCB Editor . This Creates your .xml file....Sorry its a long procedure , but i found it after many trial and error methods. Do the same for the layout file which u already have.
Now using design compare , load both your .xml files in it and you ll get a neat comparison of netlists.
Thanks, please let me know if you have any shortcut.