Stats 134 vs CS 70

Hi all, I am a CS major taking CS61A, CS61B, Stats 134 and CS 70. I want to drop either Stats 134 or CS70. I audited CS61A last semester and completed the homework and projects so I don’t think taking two 61 classes would be a problem. Stats 134 with Pitman (thinking taking the adjunct class but seems like a heavy workload). My problem is CS70 have midterm dates right after CS61B. However, I heard Stats134 is very challenging and time consuming. I will also take either CS70 or Stats 134 in summer, depending on which one I drop. What is your thought?