As far as I can tell, and I've looked, nobody in ed reform is working from a set of formal, rigorous definitions of "curriculum," "standards," "outcomes," or "competencies" sufficient to distinguish between these things consistently. As in "X is an outcome but NOT a competency/standard/outcome/curriculum because it meets criteria A, B and C and fails to meet criteria D."
I'm not even saying there are competing models. There don't seem to be any models at all.
I don't see any reason to think outcomes-based, standards-based, and competency-based systems have not been a 25 year continuous project with slight re-branding.