Importing an Altium design, eda_io reports 18 of 23 parts as lost because the author renamed PCB designators to values (R1 shows as 1K5, C2 as 100n) and KiCad's importer takes the PCB text, not Altium's SOURCEDESIGNATOR. The Altium schematic cannot be compared at all because only an Eagle reader exists, so the import is counted, not compared.