This is just an opinion, but I like M98 features. However the M98 was expensive to machine and what I see with Browning FN actions, is a cheapening of the action.
I consider this period of FN action to be the most desirable as they were closer to the military Mauser action.
This is the bolt on a mid 50's FN Deluxe, it has the bolt guide, third lug, and the firing pin safety features that block gas flow down the firing pin.
With a gas leak, the firing pin will snap back and block gas flow through the bolt shroud
The M98 had a firing pin interlock. If the bolt is in battery, the firing pin can touch the primer.
If the bolt is not closed, the lugs are out of alinement with recesses cut inside of the bolt, and if the firing pin breaks, the firing pin is blocked from touching the primer. You can see the firing pin lugs out of alignment in this picture.
The bolt stop on an FN Supreme is the buffered military bolt stop. That protects the bolt lug from battering. You can see it on this military action.
an FN Deluxe was more expensive than a pre 64 M70. At the time of this ad, a pre 64 M70 was selling for about $100.
When Browning took over distribution, the action was cheapened, the Mauser safety features deleted. You can look at the Browning FN bolt and see the bolt guide and safety lug gone. Remove the firing pin and you will see the gas blocking features gone. About all the Browning FN actions had of classic M98 features was a Mauser claw extractor.
These FN Deluxe rifles go for over a thousand now. Maybe more.