I only use slide-cream, do not like the oils at all. I find the lubrication given by the creams surpasses by far that of the oils.
I only use Superslick or Trombotine, depending on what is most easily available. To me they are equally good. I however prefer the packaging in a little pots above the tubes used by Trombotine.
I was once told that trombotine, contrary to Superslick, is of natural origin. Have no idea if this is correct. In any case it does not matter to me, as they both do their job perfectly.