I have 5000mAh labeled version I bought few months before from the same seller and Lii-500 test is about 5100mAh, 5100mAh labeled test as 5600mAh on the same charger so I believe they are not the same.
Well, if the cells are really different I may piss-off, though I doubt it. I have a couple cells from the very first batches (june 2006) with nearly no use, known to be generous in capacity. Hope they match up well if I am to buy a single cell for a 3S arrangement.