Honestly, I'm not sure it matters ... knife pivots are not a demanding application at all.
And also, I don't know which fluorinated grease is best. CRK's is fine, pretty thin, good stuff. The Tetra fluorinated grease they sell in sporting goods and guns shops is certainly good stuff also.
The nifty thing about CRK's is the little applicator/syringe thing they sell it it. The top nozzle rotates 90 degrees, to turn it on or off. Great since if you remember to turn it "off" it doesn't leak. And the needle nosed applicator works well.