I wouldn't say so. Cython is quite literally C for python, basically making all your python code look like C with most disadvantages, while not always reaching C performance.

Julia in comparison is a fully featured language, with a lot to offer - you can write highly generic + fast code in a very high-level way. E.g. have a look at https://medium.com/@Jernfrost/defining-custom-units-in-julia... You can see, that Julia can be more elegant than python while being a lot faster.