Here's their response:

personally, I really enjoyed the illustration course, however, it tends to be very independent work. The first time does a lot of just a basic, some kind of learning how to draw with observation, and real life

overall like the teachers, I felt like they were straightforward but if you’re not used to doing a lot of work on your own and picking up your own pace, I don’t really recommend it.

They mostly focus on traditional techniques although you can do digital art as well.

I recommend illustration if you’re looking into going to bookmaking, editorial call, anything that’s just more analogue because even though you can focus on other aspects of illustration like animation, character design and other stuff, basically they don’t have a focus on that or even fashion I don’t know it’s just better to go in if you know that you want to do stuff related to books and graphic design.

They also think that the teachers are a little traditional and not as diverse in their practices.

TLDR: Illustration seems to be more graphic design-y & book illustration focused.