As far as we know, there has not been a comprehensive study comparing all test methods for clothes wathers, but we do have some references on the various procedures. Some of the widely referenced procedures are:
Japan - JIS 9606
US - DOE 10 CFR 430 Appendix J and J1
Canada CSA C360-03 (closely aligned with US procedure)
International (Europe) IEC 60456
Additionally, an archive of documents used in developing clothes washer standards for Thailand. These were prepared by Chris Stone, Director of US Programs and Chief Technical Advisor for Testing at CLASP. We think you may find these useful, because they give a highly summarized overview of the characteristics of each procedure, which will give you an idea of the important factors, and key differences. Also included is a presentation that offers a step-by-step walk through of the test procedure.
Please click to download at CLASPOnline WasherFinalDraft