Window trim

Some people have been talking about replacing their window trim. I've noticed that the black exterior window trim is two different colors. The corners are definintely a different color tone than the other areas. Should that be or is it a defect?

I have the same problem, and the dealer is replacing all four trim pieces. The trim around the driver's door window also has one small imperfection that looks like subsurface rust, but I'm not sure. <br><br>I haven't seen the new trim to see if the corners are more uniform or not, will be next week before I can take it in for the replacements, but I'll let you know as soon as the job is done.