Yes this is exactly it. The gold standard is bit-4-bit matching when shifting code between systems. If you move your code to a new system and get different resu

Yes this is exactly it. The gold standard is bit-4-bit matching when shifting code between systems. If you move your code to a new system and get different results --> is it due to different summing order, or something else wrong? By ruling out the former you're more likely to get the bit-4-bit match and thus avoid a lot of debugging effort -- or spend it solving a real bug.