So to be clear, is the 2022 2500 version p/n 68519222AA, is functionally and physically the same as the 2021 1500 version p/n 68448641ab, except for the addition of the 2nd camera input of course?
Yes, it's clear. . . as mud.
Your concern was mine before I asked @Jimmy07. I don't think there is any differences between a '21 and '22.
This should simplify choosing:
1 Video Input Channel, 2021/22
68448639AB: no FCW
68448641AB: FCW-equipped
2 Video Input Channels, 2021/22
68519111AA: no FCW
68519222AA: FCW-equipped