Agreed they are both the same, however one should not be more out of shape compared to the other.
I am working on mine yet again this weekend as the screws did suffer with corrosion, I put silkaflex over the top but this has shrunk slightly probably because it’s such a fine layer.
I am now going to paint over the heads with silkaflex primer and then use tiger seal.
When installing I did use silkaflex to fix them along with the screws provided but I have always been paranoid about water getting behind the screw heads!