saving results with same net names of two different cells

hi

I ran two simulations separately to compare the output of two circuits (Both circuits are in same library with different cells but nodes names are similar). I cannot compare the two results as only the last ended simulation results are available against both net name. 

How can i store the results with same net names of two different cells? (actually its hectic in my test setup to assign different net names)

Thanks

zubair