At the risk of inciting a furor (which, truly, I am NOT trying to do):
I think Phil Wood grease is an excellent product and it always worked very well for me. But I doubt that Phil Wood has Grease Scientists who are staying awake at night perfecting their proprietary formula. It always seemed more likely to me that Phil Wood is buying and repackaging a high quality marine grease.
Several years ago, after doing some research into marine grease, I started using Peak Synthetic Marine Grease. It is blue-green in color and I have yet to find anything that distinguishes it — in appearance or performance — from Phil Wood grease. I have no idea if it is the same product or not, but it seems to hold up pretty well.
Apologies if all this has been posted before … I’m a longtime bike wrench but an infrequent visitor.