Comparing Blast M8 Outputs

Hi,

I want to compare BLAST outputs in m8 format to find out if any queries in the separate output files have the same subject hits to NCBI nr database.

For example, for the 2 BLAST outputs in m8 format below, displaying only the query and subject columns, I want to find PFD1 and GHT3 have the same hit (Hsp90):

BLAST Output 1:

PFD1 Hsp90

PFD2 Gan80

PFD5 Kan38

BLAST Output 2:

GHT1 Lsg70

GHT2 Jkl78

GHT3 Hsp90

GHT6 Odf45

Any help, suggestions or recommendations will be greatly appreciated. Also let me know if you have any questions.