This clamp is the one that came with the bike, as far as I can tell. I don’t see why the original owner would make a change like that after only having the bike a few months. Plus, it fits perfectly in a carve out inside the front of the seat tube.
I looked on Google Images for other seat post wedge clamps and their design generally looks different than mine. I’m not sure exactly what differences or parts you mean, sorry. However in the one photo I uploaded that has the clamp resting in my palm, the surface facing my palm is the part of it that goes against the seat post. Here’s a better photo of the side that should be being pushed out against the seat post to secure it.
