Was very standardised so there are many materials you can leverage and prep for. Would suggest check out linkedin / WSO for any tips. Wouldn't say it's any more or less difficult vs. other banking interviews.

Can be rigorous, testing your technical and emotional intelligence. A few rounds behavioral and technical, with seniors, it's typically all behavioral and interest driven. The biggest key is to keep calm and never let your fear or anxiety show. They are testing your ability to weather the job. By staying calm even if you need time or don't know an answer, you show them more than by reciting answers.