I would be happy to see just one form from any chinese art that is substantially or even vaguely similar to any okinawan kata. For example, dancingalone and I once had a discussion about whether wing chun's siulimtao was in any way similar to gojuryu's sanchin. In dancingalone's opinion, they were not. oh well, maybe we will have better luck with some other form.
SNT is not really similar to Sanchin except in the idea they both lay foundation.
However... Sam Chien is Sanchin. Fujianese White Crane or Five Ancestors.