- Edited
twocats
A piece can be easy or hard based on the repetitions. Having few or many notes doesn't automatically make a piece easier or harder.
You can be playing intervals or chords that are repeted throughout the piece makes it easier. Some pieces can look easy without many notes but the fingerings can be challenging. Pieces with overlapping notes played with the same hand is more difficult to remember. A few years ago I learned a Sarabande from a Handel suite.with Variation A & B after the main theme. The main theme has chords that are easy to remember. Var A is a bit tricky because of overlapping notes where you'd hold a note and play others on top.
A while ago I learned a piano arrangement of a movie theme. There are a few chords & jumps throughout the piece. Otherwise it has a lot of repetitions that made the piece easier to remember. After a few weeks of practice, I was able to play it on a public piano with ease. 1 aspect of "repetition" is the music being repetitive. The other is you repeating phrases many times to lock in the notes & finger sequences (muscle memory(.