CSM vs PSM1

Which route to take?

This is the question that I've been asking myself for some time now. Do I go down the Scrum Alliance route and take the Certified ScrumMaster course, or the Scrum.org route and the Professional Scrum Master training?

The CSM route seems to be the 'easier' route, a two day course and then an example where the pass grade is 69% and this is why I say it's easier, because the PSM1 exam has a pass grade of 85%

The cost of the two routes also has an effect on which path to take. The CSM is a minimum of £995 + VAT if taken in Leeds, and it's more if taken in London. Where with PSM1 you can do a course but you can just take the exam for $150.

I've taken the online exam prep course for PSM1 and now getting around the 90% mark, which means that I could take the course now and pass, but would I lose out on anything if I didn't take the CSM course?

Of course if during the changes at my current company means that there is an 'Agile' role been created then I could get the company to pay for the CSM course and I could pay myself for the PSM1 exam? This way I wouldn't have to make a choice and could have both? But then would this just delay the choice I have to make if/when I wanted to take the A-CSM or PSMII