I happy you asked. I had a sales rep from Texas Refinery call on me yesterday with boasts of the best grease ever made. When you do side by side comparisons of Schaeffer lubricants with anything, Schaeffer will have an advantage because: first, against Lithium complex or calcium complexes take more thickener and less lubricant than aluminum complex so right off in the manufacturing process Schaeffer grease has more lubricating oils and additives simply because it takes less thickening agent. Aluminum Complex is truly water proof and is capable of working under water if it has to, other greases will emulsify and wash out quicker requiring more frequent grease cycles therefore using more grease and increasing grease cost.
Second, comparing Schaeffer's grease to other aluminum complex greases like Certified Labs or Hydroteks or others(there are several quality greases that can perform very well) the lubricating oils Schaeffer use are much more refined with higher performing capabilities through AGMA testing standards. If you set that aside many greases with Moly will use an industrial grade of Moly at 7 microns. Schaeffer's greases use a technical grade of Moly at .7 microns which will form a much stronger bond and according to a study commissioned by Cat can reduce the coefficient of friction as much as 75%
Bottom line is when side by side comparing grease to others who can compete in the same performance catagory, Schaeffer's is going to be somewhere around half the cost because of the history behind the company. If a grease tries to compete with Schaeffer on price, they aren't anywhere close to being able to outperform its ability to last longer, reduce friction and increasing the life of the components.