The main differences between SSC exams and banking exams:
The SSC CGL program is extensive yet simple. On the other hand, the SBI PO curriculum is limited but deep.
In banking exams, especially SBI PO, questions require thought, unlike SSC where speed is the most important factor.
The attempt strategy is different in both exams.
The difference in the level of difficulty of the exams is huge. You can understand the fact that the final SSC threshold is as high as 80% points, but you only need 45% points to qualify for final selection in SBI.
Reasoning in SSC is ridiculously easy. But in SBI PO, half of the questions are a complete bouncer (just like CAT). Therefore, you need to focus more on reasoning in bank exams.
In SSC, the descriptive document plays an important role, while in SBI, the interview is the decisive factor.
(Personally, I missed the final selection by only 1.6 points due to low interview scores).