In reply to Dr.S at work:
I've been backing Samoa all week, I'm afraid - but if they're still separated by less than a converted try with ten minutes to go, Scottish discipline / Samoan indiscipline will show through.
But if Samoa put a couple of tries up fairly quick, it'll be all over: the Samoan handling is, in parts, superb and extra confidence will only make them more likely to run it out.