Wow, it wears very quickly (only 1000km!). Ming Cycles should definitely improve the freewheel design: better surface hardness and better sealing/friction of the bearings.
Is it a visual effect or is the outside diameter of the new freewheel really bigger than the OD of the used one (look at the size of the flanges)? I
f this is the case then the number of teeth is not similar 