You MUST listen to
Arrau's version

I cannot imagine how this piece can be played better

And your play is very good.
I beleive Arrau take it a bit slower (i usually tend to prefer slower tempos, especially for Nocturnes).
By the way, keep in mind that i am giving my opinion as a simple listener, because i am completely unable to play any of these pieces !!! (Clementi's easiest sonatina is my current challenge

)
By the way, this is my favourite Chopin Nocturne.