I just noticed that our tubing is really different. Since the Sure-T and the Silhouette come with the same kind of tubing, I didn't know there were differences.
Mine seems more transparent, softer and more pliable, and smoother. It also seems like the diameter is smaller. The other tubing feels rougher to me and appears to have little lines on it. I think the texture would not be great next to my skin. Of course, I do have extremely sensitive skin. Just another reason for me to be glad that there are so many choices.