Chopin added the tempo indication, including the metronome tempo, only at the stage of preparing the Etude for publication – in #AW they are absent. In A one can see that the metronome tempo was added (in pencil) to the already finished manuscript.
In CDP, the entire first part of the manuscript (to bar 19) is devoid of any performance markings, which almost certainly does not reflect the state of the copied manuscript (probably autograph). Due to this fact, we do not include this source in the notes discussing the performance indications.
Compare the passage in the sources»
category imprint: Differences between sources
issues: Errors of CDP
notation: Verbal indications