Can't say much about Mostafa's lectures as I attended like 3, but his exams are pretty easy which is what really matters. Problems are largely ripped straight out of lecture practice and sometimes homework (only the easy homework problems though.) He also doesn't seem to have issues answering questions during exams - he reexplained the concepts for one problem on the final when I just asked about wording.
I will say that he seems to have left one chapter uncovered by the end, but honestly I doubt you're going to care in the long run seeing how this is a class for life science majors.
In short, take Mostafa for the GPA boost and move on, but don't skimp on studying just because the exam problems are rehashes.

El aloui is literally the most kind, straightforward and approachable teacher. I messed up on the first midterm and he straight up told me he wouldn’t let me fail and we could drop it together. His midterms are only 4 problems and he takes them out of the midterm review for the most part. He posts all the answers to his lectures right before the midterm and said the only reason he didn’t do it weeks before was because people wouldn’t come and he’d be sad which I couldn’t even ask him further about because wow valid and also adorable. Take his class!!

Dr. El Alaoui is simply a terrible lecturer so don't take him unless you're willing to teach yourself all the material. I managed to get 98%s on both midterms.... after spending 10+ hours doing all the available practice problems before each exam. His exams all drew problems directly from the homework and lecture examples, but that didn't really help because it was pretty much guaranteed that I wouldn't understand what he was doing in lecture and I would have to go through the textbook and online tutorials to learn how to do them myself. When we tried to ask clarifying questions he would eventually cut us off, saying we were taking too much time. I don't think it's too hard to get a good grade if you're willing to put in the effort, but you will be dragging yourself through the class completely on your own. The labs are also bullshit as always, and Mostafa got so behind in lecture that you would have to do the pre-labs with literally no knowledge of the material. Hell, we skipped the complete last chapter of material entirely. I would recommend taking literally any other professor unless you know all the course content or have a lot of time to spare. The one positive is that he gives formula sheets with his exams.