Eberl's work on the 'Zu Steffen sprach im Traume' theme highlights the late Classical interest in systematic variation techniques. His writing style is idiomatic and makes effective use of the piano's range to add color to the repetitive theme.
The primary challenge is maintaining the structural integrity of the theme throughout the changing rhythmic densities.
Comparable difficulty and character — good candidates for what to learn next.
10 Variations on 'Zu Steffen sprach im Traume' 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 10 Variations on 'Zu Steffen sprach im Traume' lasts about 6 minutes.
10 Variations on 'Zu Steffen sprach im Traume' 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 12 Variations on 'Bei Männern welche Liebe fühlen' from 'Die Zauberflöte' by Anton Eberl, 12 Variations on 'Freudin sanfter Herzentrieb' by Anton Eberl, 12 Variations on 'Bei Männern welche Liebe fühlen' from Mozart's 'Die Zauberflöte' by Anton Eberl — see the full similar-pieces list on this page.