- Edited
This is an interesting question.... I suspect what would be learned would depend on the piece, the person, the pianist selected as a model..... But I suspect that absolutely you would learn something.
I don't set out to try to copy someone's phrasing or articulation, but often when I've been working on a piece, I'll go back and listen to the original* and then I notice things that I didn't notice when I first started working on it.
*I most often play contemporary pieces, so the "original" means, the recording performed by the composer, something not available for most classical music.
With pieces by pianists like Einaudi, Sakamoto, and Hisaishi (among others), they often have released live versions and then there's the original release, so hearing and comparing those live versions is also instructive....