How does Socionics Si differ from sp instinct in Enneagram?

Si themes (from wikisocion):
harmony, pleasure, health, comfort, pleasantness, satisfaction, convenience, quality, cosiness, aesthetics
sp focus (from http://theenneagram.blogspot.com/200...stackings.html ):
likely to most of the time be calm, centered, thoughtful, especially aesthetic, orderly, mindful of health issues, and concerned about establishing optimum comfort and tranquility in their environment.