The observation that’s necessary to make is this
Airbus luggage is in bins (ULDs Unit Load Devices) and loaded in/out of the hold
Boeing does the traditional bag by bag loading
The first is going to be quicker UNLESS you need offload a specified PAX Bag in which case if it’s in the first bin in, you gotta take all 3 out to access it !
However, normally turn around time is gonna be faster
Also found this of interest cause everyone wants some FREE MILES
[URL unfurl="true"]https://nomascoach.boardingarea.com/travel/alaskas-20-minute-bag-guarantee-explained/[/URL]