Hello Aspirant
It is difficult to predict because this both are good with there respective core subjects.
Mechatronics is about synergy of electrical, computer and mechanical that leads to solutions.
To know more about this go through the below link you get more idea about this course:
https://www.careers360.com/mechatronics-engineering-course
Computer science engineering is mainly focused on basis elements of computer programming and networking.
If you have any questions further about this course you can go through the link below from career 360.
https://www.careers360.com/computer-science-engineering-course
If you have any questions further let me know.
Thank you!!!