you right. listening to it closer, the piano licks are all 'live' and sound different even when the melody is repeated. kind of like you can never make a snare drum sound exactly the same when banging it twice in a row.
only thing that had me going was the 'pop' at each melody repeat - like it's a sample looping back to the beginning. It happens for the entire 1:06, at every melody repeat. Maybe they did it on purpose.
What a dope melody though, i'd love to know who played it