1.- I wonder if you can help answer my query. I want to know if there are any disadvantages in doing ISO 27001 with one board rather than other? I am looking at a course which is run over 2 consecutive weekends and certified by PECB. All other courses I have looked at are certified by IRCA.
2.- Do you have any suggestions on opinions on this? Also are the exams the same format/difficulty for both boards?
Point 1: There are many companies and all are good, our recommendation is that you search a course accredited by IRCA or RABQSA (although PECB is also a good entity), because this means that, once you pass the exam, this certificate will be accepted by any certification body if you want to work as lead auditor with them. Maybe this article can be interesting for you How to become ISO 27001 Lead Auditor : https://advisera.com/27001academy/knowledgebase/how-to-become-iso-27001-lead-auditor/
Point 2: Regarding the exam, I think that the important is to know in detail the basic points of the standard (risks assessment & tr eatment and security controls), and depending on the entity there will be more or less questions about one or other, but if you have good knowledge about them, surely you do not have problems. So, if you want to prepare the exam, this webinar can be interesting for you ISO 27001 Lead Auditor Course preparation training : https://training.advisera.com/se/iso-14001-internal-auditor-course/o-27001-lead-auditor-course/