does anyone know why 16" with max is a bit heavier than one with pro

[vivid.gear71]

Apple said "Weight varies by configuration and manufacturing process." but I would like to know if 16" with max uses slightly different cooling system or cooler.
Is there any link or video explains this ?
Thanks

 

[ProfessionalFan]

The theory is that it is for better cooling, but nobody knows for sure yet.

 

[Appledoesnotlisten]

I don't have an answer, but I stressed a base 16 Pro so badly with lots of apps (and 2 extra monitors) today and it got only a little warm while the fans stayed silent. That is a 5 star cooling system, I'll tell you that!

 

[PTLove]

A slightly larger / heavier heat pipe would be my guess.