There are much in common in working principles such as Taxation, Accounting etc but there are a huge difference in the depth of the curriculum. CA have a larger and a very deep curriculum.

The curriculum for BBA are provided below(Subjects that are present in most of the universities):

Year-I :

• Human Resource Management I

• Effective Communication I

• Principles Of Management I

• Managerial Economics I

• Financial Accounting

• Business Law I

• Quantitative Methods I

• Principles of Management II

• Computer Applications

• Management Accounting I

Year-II:

• Human Resource Management I

• Effective Communication I

• Principles Of Management I

• Managerial Economics I

• Financial Accounting

• Business Law I

• Quantitative Methods I

• Principles of Management II

• Computer Applications

• Management Accounting I

Year-III:

• Operations Management

• Taxation

• Research Methodology in Management

• Marketing Management

• International Marketing

• Export/Import Management

• Public Relations Management

• Project Management

The curriculum for CA is provided below:

Foundation Course

• Principles of Accounting
• Business Laws
• Business Correspondence and Reporting
• Statistics
• Business Mathematics and logical reasoning
• Business Economics
• Business and Commercial Knowledge

Intermediate Course

• Accounting
• Corporate and other laws
  Company laws
  Other laws
• Cost and management accounting
• Taxation
  Income tax laws
  Indirect taxes
• Advanced Accounting
• Auditing and Assurance
• Financial Management and Economics for Finance
  Financial management
  Economics for finance
• Enterprise Information Systems and Strategic Management
  Enterprise information systems
  Strategic management

Final CA Course

• Financial Reporting
• Strategic Financial Management
• Corporate and Economic laws
  Corporate laws
  Economic laws
• Advanced auditing and professional ethics
• Elective paper
  Risk management
  International taxation
  Economic laws
  Financial services and capital markets
  Multi-disciplinary case study
  Global finance reporting standards
• Strategic Cost Management and Performance Evaluation
• Direct Tax Laws and International Taxation
  Direct tax laws
  International tax laws
• Indirect Tax Laws
  Goods and services tax
  Customs and FTP

Now you can compare it by yourself.

To know more about BBA as a career choice visit the link below:

https://www.careers360.com/courses/bba-bachelor-of-business-administration

To know more about CA as a career choice visit the link below:

https://www.careers360.com/courses/chartered-accountancy-course

I hope this answer helps. All the very best for your future endeavors!