The answer to this question is which exam is much tougher IBPS PO or IBPS SO, vary from candidate to candidate and even there are factors like competition, specialization and knowledge which decides the success in both exams. Any graduate candidate can apply for IBPS PO, but for IBPS SO a candidate needs to have specialization in particular fields for which they are applying.
There are a huge number of applications received every year for IBPS PO and generally a candidate is placed in fields like Planning, Credit, Operations,Administration etc after clearing IBPS Po. Whereas IBPS SO candidates after clearing the exams posted in specific fields like IT officer for IT Department, Agriculture Officer for Rural Department and vice versa.
The reason behind higher competition in IBPS PO is due to these reasons -
So both IBPS SO and IBPS PO are exams of the same level, the only difference is the candidate's interest in it. Full dedication, hard work, right guidance and better preparation can help candidates clear both the exams with ease be it IBPS PO or IBPS SO.