It's not me, but my STLE colleague who is comparing the two greases. He got a pail of Infinitec last month for evaluation so I filled a coffee can full for my use. He made a comment that Infinitec is more resistant (or tolerant) to water, and has better high temperature performance. Keep in mind that besides grease performance, cost is always an issue for our manufacturing.
Besides the two properties mentioned above, we also look at shear stability, make sure it has EP additives, and that it doesn't attack the bearing metal at elevated temperatures.
Here's the details from their web site:
Exxon Infinitec
INFINITEC
"Thickener Type" Lithium Complex
"Color" Blue
"NLGI Grade" 2
"cSt @ 40°C" 148
"cSt @ 100°C" 14.1
"Base Oil VI, ASTM D 2270" 91
"60-Stroke Penetration, ASTM D 217, mm/10" 287
"100,000-Stroke Penetration, ASTM D 217, mm/10" 308
"Dropping Point, ASTM D 2265, °C" >300
"Oil Separation, ASTM D 1742, %" 0.9
"High Temperature Oil Separation, FTM321.3, 30 hr @100°C, %" 1.7
"Lubrication Life, ASTM D 3336, @177°C, Hours" 90
"Wheel Bearing Life, ASTM D 3527 @160°C, Hours" 390
"Wheel Bearing Leakage, ASTM D 4290 @160°C, Grams" 0.4
"4-Ball EP Weld Point, ASTM D 2596, kg" 315
"Timken OK Load, ASTM D 2509, lb" 60
"Water Washout, ASTM D 1264 @ 80°C, %" 4
"Water Spray-off, ASTM D 4049, %" 45
"Rust Protection, ASTM D 1743" Pass