Vanderbilt Music in USA carries both, and describes both on their website. The pieces are in different order, with Nocturne and Reverie being reversed.
I thought there was a discussion on this forum a few years back about this very subject, but have been unable to find it. What I remember from that discussion is that the Leduc edition is original, There are several significant changes, including several measures quite different between the two. I understood from that previous discussion, and from no editor being mentioned in the Lyra edition, that Grandjany revised the piece for the later publication.
Both are written for pedal harp. The Lyra has notes made on how to modify for lever.