I personally be very critical to the Key Tool test of DJTT. My personal result match more to the result from Dj Endo on Dubspot(But they don’t update the test jet).
If they just peak some random Track the result can be some time very good or next bad.
MIK is one of the best Key Tool, there is typical one case of error guess Minor Key instead of Major Key. Or Track cannot really get keyed in any Tool.
Serato Key guessing seams good, but in the moment on some tracks there are some issues. Need some smaller improvement and then it will rock.