There appears to be burn marks in both woods. Caused by several factors, but most commonly by a dull blade, improper/inconsistent feed rate, or both.
Some woods will be more subjective to this than others.
If you think they're both domestic hardwoods, cherry and maple suffer the burn marks the most easily in my experience.
Then again, as always, it could be anything, so definitely don't take my word for it. Just a lead to maybe help narrow it down. My vision gets worse every day!