How to compare two strings in a line (compare them line by line) in shell?

Question

I have a file like this:

975 SCE A_DRVR 4.15

852 A_BE AB_SU 3.27

2009 B_GA AB_SU 0.25

35 A_DR_D B_DR 1.54

648 A_VME AB_ABC 0.56

241