I got my batteries today, they look just like the OEM HTC batteries with one exception. I noticed this because I could not get my cover to go back on right.. the battery would not sit down in all the way.
There is a slight difference, the top is one of my batteries that I bought from the link above, and the bottom one is the one that came with my TP. I shaved the tab off with a box cutter, but why would there be a difference if they were both OEM HTC batteries?