@all, I may have answered our own question with these image finds;

Above: the clipstrips and wall pegs in this image provide much better scaling eyeball estimates than the other images widely available, or the packaging description of the item itself. Image Courtesy of thewolfpackpodcast.com: an upandcoming starwarsy blog.


Above: imagery that seals the fate of these minis: a direct comparison to a regular bucket o army men figure. that suggests this thing is 2-3inches tall. Image courtesy of the Fwoosh.com, checkout ol' fwooshy, you'll be glad you did.

So, in this image, and a couple further on at the blog they're sourced from,
we see that the figure is near a smart strip for signage and near the hanger.
Based on that, and the discussion/comparison images with toysoldiers for scale elsewhere,
eyeballing it puts them at ~2&1/4" or, about 3mm too big all around to be used with our minis.
That is a significant sizing difference, especially if you compare Luke from the Rebel Storm Starter with the Star Wars Command Luke Pilot figure...

a shame, but maybe the star destroyer can be a cheap starship conversion project?

The frustrating thing is, from the product description... the base/plinth the figures are on is 3mm deep: same as our figures. They're just a fraction too bulky