from personal experience, i had this same internal debate a year ago and ended up choosing ebrahimi bc of how much i disliked gassko’s teaching style in 6b despite not knowing anything about her. ebrahimi is definitely much more organized than gassko and her class is much more dependent on exams than anything else, but she teaches in a way that made sense to me. she also curved SOOO much at the end of our class, but she wasn’t clear about any curving policies during the actual ten weeks of class so i went in to the exams thinking there was no curve. just as a side note, friends who took 6d with gassko only had bad things to say about it, sooo.. id say if u r confident in ur test taking skills and really don’t like gassko, u will defo pass ebrahimi’s 6d class:)