I recently purchased from Buds Benz two windscreen to hard top/soft top rubbers to replace the originals on my car. As an exercise, I ordered one of the OEM rubbers and one of the reproduction rubbers. See photo. The OEM is the grey looking one, it has elastomeric protection on it. The repro rubber is just that with no protectrant on it. Am replacing the small screws that hold the chrome on whilst have it open as there is some minor rust on the screws.
The other differences is firstly the OEM is slightly longer and I am yet to see if one or the other doesn’t fit. However the OEM one is considerable softer and thus can be manipulated into the channel easier and also will enable expansion.compression to fit the total width of the front channel.
You can also note that the cutout for the top latch is slightly different between the OEM and Repro. Again until fitted I am not sure what the effect of the differing shape cutouts makes.
Will add more as I clean and fit new rubbers to both hard top and soft top. Plan is to put Repro on Hard Top, OEM on Soft Top which is used more frequently.
Garry