Myself, I really don't think it makes much, if any difference on lubricants now days.
I'm not fussy on brand. I suggest you have a new set of grease seals to put in. The old ones will be destroyed when you knock out the inner bearing.
If you crawl under the trailer and look at the axle you should see a tag stating what the axle is rated for in #. With that info you should be able to get the correct seals, and bearings, if you need them from etrailer.
Here is a utube video that shows how to hand pack a bearing.
This guy is using grease out of a grease gun. That I don't do.
Clean up the old ones and inspect them for any problems.
Remember---keep everything CLEAN.