They are two very different fields of study which you can't compare. If you do it from a good college like DU or reputed private universities like Symbiosis University, LPU or Amity University then you'll have definite chances of getting placed in both the branches.

BBA is basically Bachelor of Business Administration and if you want to pursue higher education like MBA the knowledge you would get in BBA would be really helpful. But you can pursue MBA with any branch in your graduation.

BCA is Bachelor of Computer Application and if you are interested in computers and softwares you can approach for MCA from colleges like JNU or NIT Warangal and Trichy that guarantee you a great placement in companies like Google, Oracle and Microsoft.

So you can choose a branch as per your preference and both will guarantee you a good career.