I have 6 of those Faber Castell matte here,, but I didn’t yet test the difference side-by-side.

I can test them and scan the result if it helps you ☺

Or do you need a photo (I could take a rough photo with the webcam)?

For smudging: I just tried rubbing the sheets together and didn’t see any smudging, but I think I didn’t put on enough to actually see that. I’ll try making it darker …

here’s a first test without smudging and without any postprocessing.

Here’s an adjusted version with a line erased into the eyes and aggressive smudging with the finger over the mouth (left is the normal pencil, right is the matte, I do not see a significant difference …) and three hash-tests: 12B, 6B, 2B, all three smudged for about 2 seconds with the finger (I only see smudging for the 12B, the others seem clean).

I rubbed the two sheets again, but still don’t see anything transfer to the other side.

The left eye is with a normal HB pencil, the right eye with a 2B matte (but not sharpened …), the left part of the mouth with a 2B mechanical pencil (0.5), the right part of the mouth with a 2B matte pencil (but sharpened), the whole nose is with 6B, the chin and below is with 12B matte.

Is there another specific test you’d need?