This is the fiber comparison photo I keep seeing. Those two fibers do not look the same to me. They don't look like the same color, width, texture, etc. I just don't even know what to think about this photo.
The fiber on the left is definitely orange, and has bright orange streaks running through it. The one on the right is more yellow-y, and doesn't have the same bright orange streaks. In addition, the fiber on the right has long white streaks through it that the fiber on the left doesn't have. The fiber on the left looks narrower and rounder than the fiber on the right, which looks kind of broad and flattened.
If I were examining these fibers for evidence, my first guess would be that they DIDN'T match.