huntersdad wrote in post #17462568
It was discussed over on FM as being answered rather authoritatively by Chuck Westfall, I believe. I have confirmed the same personally with CPS.
It only makes sense that the underlying drivers are different. If they weren't, why have cases at all? You'd need one screen for adjusting any of the 3 parameters. A look at the cases and their bias towards certain actions and movements make it pretty clear they are not the same.
So I did some digging.
From Chuck Westfall as reported on the digital picture. Com.:
All three cameras (1dx, 5diii, 7dii) use the same AI Servo AF algorithms (i.e., AI Servo AF III), and all three use a similar system for setting AI Servo AF characteristics, based on a menu structure with 6 customizable “Case" scenarios. Each case can be customized in terms of AF Tracking Sensitivity, Acceleration/Deceleration Tracking, and AF Point Auto Switching.
It was also mentioned that the 1dx had 5 values for some of the subsettings in the Cases.
I wasn't yet successful find the source you mention about different underlying algorithms.
I am thinking of emailing Chuck directly to ask and put it to bed.