I got both a genuine Manfrotto 323 and the 12$ ebay clone and took some pictures for you to compare. The Manfrotto one looks more valuable. The release lever of the clone is a bit loose bit holds the plates in very well. The Manfrotto plates fit the clone very well too.
I think the clone is good enough for what I’m doing with it so I will stick with it.
To view without plate
Bottom view. Note the slot in the mounting hole, a store bought 323 does not have this slot. I took this one off a ball head because my 323 was in use at the time. That’s the only difference.
Plate top view
Plate bottom view