Arthur Hinton's Bolero is a more sophisticated and technically demanding work than the average salon piece. It employs advanced chromaticism and a richer harmonic language typical of the late 19th century.
The primary challenge is maintaining the bolero rhythmic drive while applying necessary expressive rubato.
Comparable difficulty and character — good candidates for what to learn next.
Bolero is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 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.
A typical performance of Bolero lasts about 5 minutes.
Bolero 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 Bohemian Dance by Rudolf Friml, Allegretto capriccioso by Robert Volkmann, Allegretto capriccioso by Robert Volkmann — see the full similar-pieces list on this page.