I have reviewed the TI datasheet for the above items, and cannot tell the difference between them - is there a difference?

Hi BBrewster,

Welcome to the Tech Forum.

Well, I am not sure where the part numbering difference comes from, maybe from an old acquisition, but, according to the TI website, they are identical parts. See snip from their website here:

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Very much appreciate the confirmation David

SN has historically been a prefix for TI IC’s and UA was a prefix for Fairchild IC’s.

78 series linear regulators used to come with LM, MA, MC, SE, SN and UA prefixes depending on the manufacturer. (I may have missed a manufacturer or two)