was suprised to find a small amount of grease on one side and no grease on the other side.
Don't be surprised, thats what happens when they're transported, grease isn't solid, it all falls to the lowest point.
TINAS - works if you're day to day engineering isn't overly sensitive. There is a reason there are loads of grease types out there, though a lot of the time it's small gains for large costs rather than application specifics.
Based on what?
Fair point. But which is more likely
1) Bearings fail because seals have failed (despite being protected from impacts/serious grit buildup etc by the hub bearing shroud, if properly designed)
2) Bearings fail because heavy use creating slightly larger gaps around the seals, meaning the seals fail, leading to corrosion and further destruction, looking like the seals failed first.
Having spoken to a few bearing manufs I've heard both said, straight from the manufacturers mouths. So both are valid answers IMO, but the act of pulling the bearing seal out and re-fitting is more likely to add a failure mode, I can't see anyone arguing that. And just because you have more grease in there doesn't mean the bearing is now grit-proof, it just means that if water gets in you get a grit/water/grease paste just as before, only you probably started with an over-packed bearing (stops the balls rotating properly and causes them to "skid").