Schweser Practice Exams - which one of the two volumes is more difficult

I have two volumes of Schweser Level II practice exams. Which volume is supposed to be more difficult? When I was doing Level I, one of the volumes seemed to be more difficult than the other. Thanks for someone’s clarification in advance!

second one. similar based questions, just make you work harder to find the info.

L1 volumes one and two just seemed to test different material.