Renaissance Wax is a completely different formulation from floor wax.
I did an abusive salt water test on a number of products, including Renaissance Wax and found that it performs very well. However, it is expensive. While it's true that a little goes a long way, it didn't perform so much better than the other good performing products that I felt like it warranted the extra expense.
I will say that Renaissance Wax is the default preservative of museum Curators and I guess that counts for something, and it did
You can see my series of articles on corrosion testing here: http://cbd.atspace.com/articles.html
Peace favor your sword,