B733 is correct.
SOP's are usually developed with at least some input from the manufacturer (who in turn serves as a bit of a crucible for feedback from other operators plus investigations of incidents), who has also run the flight test program leading to type certification. Operators (especially first-time operators of a new type) who choose to ignore manufacturers recommendations are "...looking for somewhere to happen..." as the saying goes.
Similarly, adapting SOP's from another type can have some pitfalls. Whilst a degree of standardisation across different fleets is important, this should cover things such as standard calls and phraseologies.
Stick to the manufacturers checklist and you can't go wrong.