I agree they are the same lads, and both pics must have been made in a short time frame because the same people seem to be in the background. The overexposure makes it hard to recognize all the faces, otherwise we could determine who took the pictures (assuming both pics were not made by the same lad).
I wonder what they were up to; beware when the lads are together.
As innocent as they look, I am sure they were quite the wild group! Fun postcard!