The first has blue trunks, the second doesn’t. First has blue boots, second has red. Second has a belt like the one on the Stargirl and Starman suits, first seemingly doesn’t. Plus the aforementioned star pattern. There’s also this other photo of Star-Spangled Kid where he’s definitely not wearing the second suit, so presumably this is also the first.
Edit: I forgot about the mask. The second suit has weirdly shaped eyeholes, but the one in the newspaper has more normal eyeholes.