It is a sad fact that many companies have tried to re-invent the wheel by making some of their standard procedures rather verbose and...well frankly, not so bright.
In many cases, this is a holdover from earlier days when aeroplanes were not as automated as they are today, but (and I smile every time I write this, as it has proven so very useful in the past*) some carriers have had very nasty accidents in the past, and their specific procedures have been designed so these types ( and many others as well) of accidents will never, ever happen again.
In addition, some carriers try, as much as possible, to make their specific standard procedures common from one type to another.
Lets face facts here...this can only be carried so far, as clearly a FBW Airboos with its side stick is rather configured differently, and requires different specific procedures, than (for example) a B737NG.
*PanAmerican, with their configuration check as the very last item on the before takeoff check.