I suggest that when IMatch searches for colour space information to populate {File.MD.photools.com::IMatch\1700\iccprofilename\0} that it uses the embedded profile name {File.MD.ICC_Profile::Main\desc\ProfileDescription\0} if one exists before any other field.
See https://www.photools.com/community/index.php?topic=3669.msg24450#msg24450 (https://www.photools.com/community/index.php?topic=3669.msg24450#msg24450)
I agree.
The embedded profile is for sure the important thing.
See my comment to your original thread.