Reasoning:

* Crater morphology: Kepler has a well-defined, sharp rim and a relatively smooth floor, indicating a younger formation. Mee, on the other hand, has a more degraded rim and a rougher floor, suggesting it is older.

* Crater density: The area around Kepler has a lower density of craters compared to the area around Mee. This indicates that Kepler formed after the region had already experienced a significant amount of cratering, while Mee formed earlier when the cratering rate was higher.

Conclusion:

Based on these factors, it is clear that Kepler is a younger crater than Mee.