It will be similar. The 1.6 was most likely a 1.28, but they didn't have to call it that before.
Now that Watersense gets rebates, it now makes more sense for the manufactures to label them down, not up.
Looking at purchasing Toto Lloyd and wondering if there is a difference in the flush quality with the Lloyd 1.28 compared to the 1.6. I cannot find any reviews on this toilet anywhere.
Thanks for the info. Have you used/installed the Lloyd? It is not on your list of toilets, but I am assuming with it being a Toto it will flush well. Thanks again.