As I know, we can create a Marketo Custom field, then create the same field in SFDC --> Map this field on SFDC.
There is also a way that create a new field in SFDC, then it will be added to Marketo based on the doc: SFDC Sync: Field Sync - Marketo Docs - Product Documentation
I am curious if there is difference between these 2 different approaches? If so, what's the differences would be?
Thank you in advance,