Anhydrous lanolin (no water) leaves no concerns with die corrosion so it's probably a better choice...and probably a better lubricant as well. I already forgot the fellow's name but a member here at castboolits is selling it and a good number of other bullet lube components at *really* (as compared to the pharmacy I tried locally) good prices. I think a pound of anhydrous lanolin was like $8. Just search on "lanolin" or "bee's wax" and you should find him in the vendor sponsors as I recall.
That having been said, I have found that lanolin really turns gummy over time so I like cleaning it off my dies etc. and lubing them with something else for storage, anyway.
Paul