OK.in the late 60's and early 70's you could buy a Sako ,fit a Pecar scope to it and start making a living with it straight out of the box .
The actions were as smooth as silk and never ever had feed problems.
The extractor system worked perfectly and was copied by other companies and custom gun makers.
The older models pre the 85 all had recessed or closed bolt faces unlike the 85.
Metalurgy was and is better on the older models.
Trigger gaurd and floorplate were one piece prior to the Mod 75
Bedding system on the pre 75 mod is a lot better.
Magazine size on the mod 85 doesnt allow reloaders sufficiant room to use various longer projectiles

Thats all I can think of for now but I'm sure that other shooters will have some more positive and negatives on the subject.
Al