Indoor pre-dinner family photos

Hi, I too had found this page, my confusion was compounded by some of the listings on Amazon, some say Professional, some Mk II and some even say both

The Amazon item, B002A9IZ9C, says Nissin Di866 Speedlite Canon Fit Professional Flash in the title and Mk II in the Product Description below. I've just rung Amazon who said if it says Mk II then it should be, if it the wrong one that arrives they will accept a full refund. It is even the wrong picture as it hasn't got the II logo. They are not making it easy.