[Paraview] How to compare 2 vtk files using paraview?

[chee chin tan]

Hi, 
 
I have 2 vtk files where the nodes point is different for each vtk file.  Is there a way to compare the data point by point.  
I am particularly interested in finding the percentage difference between the 2 data.  
Thanks
 
Best Regards
Chee Chin 		 	   		  
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