There is nothing like which one is better in between commerce and science, if you have interest in commerce then you should opt for it and if you have interest in science streams then you should opt for it. It totally depends up on your interest.

In commerce stream following higher studies options are available;

B Com (Honours in Accounting and Finance)
B. Com (Accounting & Finance)- BAF
B. Com (Banking & Insurance)- BBI
B.Com (Financial Markets)-BFM
B.Com (Honors)
B.Com (Professional)
B.Com+ Cosmic Certified Accountant (CCA)
B.Com. (Computers)
B.Com. (Honours in Accountancy)
B.Com. Corporate Secretaryship (Day & Evening)
B.Com. Hons. in e-commerce, Economics and B. Com (Banking and Insurance)
B.B.A. - Bachelor of Business Administration
B.B.M (Bachelor of Business Management)
B.B.M. (Shipping)
B.Com (Computer Application)
B.Com (Financial Accounting)
Financial Accounting
B.Com.(Commerce)
B.M.M. ( Bachelors Degree in Mass Media)
B.Sc (Business Computing and Information Systems)
B.Sc (Economics)
BA (Hons) Marketing & Advertising Management
Bachelor of Financial and Investment Analysis
Bachelor of Foreign Trade Management (BFT)
Bachelor of Hotel Management & Catering Operations
BBA (Hotel Management)
BBA (Tourism Management)
BBA in Aviation, Hospitality & Tourism
BBA(IT)
BCom (Economics,Mathematics,Accounts)
Certificate Program in Insurance (CPI)
Certified Industrial Accountant
Diploma in Banking
Diploma In Equity Arbitrage Trading & Operation
Diploma in Financial Accounting
Diploma In Stock Analysis & Portfolio Management