m&v,
Obviously there are runways where no special procedure is needed and others where only one way out exists.
For runways with moderate problems, though, there is no reason at all why two ops engineers shouldn't come up with two different procedures for such runways ... sometimes a procedure designed to drag the last kilo out of the takeoff is deemed too workload intensive or navigation critical and a simpler procedure will be adopted for the cost of a bit of weight .... horses for courses and, to a large extent, a matter for company compromise between flight standards policy and the beancounters.
I would be VERY wary about pinching other operators' procedures unless you are VERY sure that the aircraft AFM data is identical and that you know ALL the subtle details of a particular operator's techniques ...