See Data Science is a broader field. Data Science isn't always technology related instead it can be used in multiple purpose for analyzing and inferring from data sets. Now If you get to collaborate Data Science & Machine Learning then the job scopes broadens up. AI & ML is also a great course choice and having such skill sets can help you to go for Identification & resolution software engineering.

So there is nothing so called 'Better', both the fields have very good scopes in industries, the thing you should be concerned about is that you should select the course which you are interested.

For more information regarding AI you can consider the link below:

https://www.careers360.com/courses/artificial-intelligence-course

For more information regarding Data Science you can consider the link below:

https://www.careers360.com/courses/data-science-course

For more information regarding a career as Machine Learning Engineer consider the link below:

https://www.careers360.com/careers/machine-learning-engineer

I hope this helps. Wish you a great day!