Raff's '10 Gesänge für Männerchor' Op.97 are settings of vocal pieces for male choir, showcasing his skill in composing for vocal ensembles. The piano arrangements would likely emphasize rich harmonic textures and a sense of grandeur.
10 Gesänge für Männerchor (Op.97) is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
10 Gesänge für Männerchor (Op.97) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.