As I understand it, on the larger Stihls, there is a standard oil pump and a high output oil pump. The latter was usually installed on saws sold here in my part of the world, where long bars are the norm.
These largest displacement saws do not generally run like race cars...more like long haul eighteen wheelers. By that, I mean not so much high revving top end speed, but more on the order of torque to die for.
So for sure, with a 60 inch, or even much more, bar and chain...torque wins over a high rpm saw with less grunt. Put the same powerhead on a 24 inch bar, and try to race a much smaller displacement saw, but that generates much higher rpm...the big boy may not impress.