How can I put this question in a Glock forum ..... new to this.

I have a glock 19 and a newer glock 26, both are gen 3 the 26 is two years newer. The question I have is that the slide on the 26 is slightly lighter in color than the slide on the 19 and seems to be less protective and eaisly prone to scratches ... does anyone know if glock changed their tenifer coating ??

I would appreciate any info on this matter.