Comparing two edge list

Hello,

I have two network edgelists with first two columns as nodes and the last column pearson correlation coefficient (PCC). I want to remove the edges from net1 whose edges are common with net2 && (PCC)net2>=(PCC)net1

net1.txt

A    B    0.6 
A    C    0.7
B    C    0.7
D    C    0.8
G    H    0.8

net2.txt

B    A    0.7
C    A    -0.7
B    C    0.5
D    C    0.8
E    F    0.8

Desired output:

net3.txt

A    C    0.7
B    C    0.7
G    H    0.8

Thank you

Any attempts / ideas / thoughts from your side?