Grünfeld's Op. 38 represents a more technically involved and harmonically adventurous entry in his series. It features larger chordal structures and a wider dynamic range, pushing the standard salon barcarolle into more dramatic territory.
The main challenge is balancing the large chordal textures while maintaining a light, swaying rhythmic impulse.
Comparable difficulty and character — good candidates for what to learn next.
Barcarole No.3 Op.38 is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 8.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Barcarole No.3 Op.38 lasts about 5 minutes.
Barcarole No.3 Op.38 is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Barcarole by Alfred Grünfeld, Barcarole No.1 Op.21 by Alfred Grünfeld, Barcarole No.2 Op.24 by Alfred Grünfeld — see the full similar-pieces list on this page.