The plumbers are not in agreement. We know that some products have a special run with some different parts for a certain purchaser. You can’t go by model number any more you have to go by the part number and suffix and UPC code. Sometimes these products have a different warranty source. I cannot take something you buy at Lowe’s to my regular manufacturer provider for warranty. The box stores and the manufacturers say the merchandise is not of lower quality. Yet some plumbers insist they see the inspector marks on the toilets where they were turned down in manufacturer but repaired and sold in a different lot. I am envolved in about six toilets a year that are taken back to Home Depot or Lowe’s and that seems to be the case across the country.
I think the cast iron is the same but I’m not sure.