[UnknownVT]

My post is quite old--I was reporting the early conclusion of someone who had made a comparison; I think later the same person disproved that conclusion. In light of newer comparisons, it appears there is no difference btw. K-x and K-r.

Ooops didn't note the date of your post,
sorry wasn't being confrontational -
always interested in seeing different points of view.

Thanks for clarifying that.