Salvo is hoping I have forgotten the bet he made about his batteries. :)
--They kept the old specs line up from when they were with US Battery so it is still like the days when Interstate also used the US BAttery numbers:
U-2200 is 232AH
there is/was a 216, a 208, and ISTR a 19x
Other companies that rebrand US Battery sometimes have that same numbering with U-2200 etc or they might use just U-220. One I saw has the same U-numbers but they got the AH line up out by one notch.
The newer GC2 XHD etc family made in Mexico have the same 232AH etc as the old U-2xxx line up
While Costco and Sam's have better prices, do compare the same size batts. EG don't compare the price of a Costco 208AH with the price of a 232AH batt elsewhere. They might look the same with black sides and a green top, but they come in different AHs. Weight is a good indicator if the AH rating can't be found.