WOW...kinda sorts amazing...
My 1996 K3500, 7.4l GMC Suburban's thermal rejection system's coolant capacity is 25 quarts and if you include the third (in series) heat rejection radiator, the total coolant capacity is 27.5 quarts...there is second in parallel coolant radiator is normally included in that 25 quart capacity...as are all the vehicles you folks are talking about are included in their coolant capacity number
Out of context, just looking at the total coolant amount.
As it all boils down to (pun intended) the BTU's needing to be rejected per minute, that dictates the total coolant.
Plus other factors like rejection/absorber surface area, GPM, CFM, PSI, thermal differential and a few more...like laminar flow of both internal & external thermal carrier material(s)...