Guiraud, primarily known as an orchestrator, crafted this piece in a refined Romantic style. The music is characterized by its balanced structure and frequent use of idiomatic piano display techniques.
Focus on the fluid transition between delicate ornamentation and assertive concert-style chords.
Comparable difficulty and character — good candidates for what to learn next.
Allegro de Concert pour piano is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 9.
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 Allegro de Concert pour piano lasts about 8 minutes.
Allegro de Concert pour piano 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 10 Variations on 'Unser dummer Pöbel meint' by Wolfgang Amadeus Mozart, 10 Variations on "Unser dummer Pöbel meint" for Piano in G Major by Wolfgang Amadeus Mozart, Sarabande by George Frideric Handel — see the full similar-pieces list on this page.