I need quotes supporting how Maus part one and part two are different and how part 2 focuses more on facing their current problems.

I can make a general comment. In Maus II, the overall tone is different from the first edition as the reader dives into more personal experiences shared by Vladek. These more personal experiences, often times scenes showing anguish, defeat, depression, and pure fear and pain, are colored darker than previously seen in Maus I.