Hi furtwengler,
Bravo! This is a fine performance of this very complex and gorgeous nocturne.
I love the Faure "Nocturne" No. 13. The only one of that set that I've recorded here is the more Scriabinesque No. 6 in D flat, so having not played No. 13 myself, I cannot do a detailed critique. Although I have many Faure scores at home, not this one, so I couldn't follow along with your playing.
Few know that the Nocturne No. 13 was the very last piano piece Faure ever wrote. I saddens me that in Faure's retirement he was very poor, living in a garret and at times had to sell his valuable manuscripts for a pittance in order to survive.
From listening, one can easily discern its ternary form with its more agitated Part B. The character of this piece strikes me as being very pensive and meditative but not without angst at times, and yet the nocturne is not overly dark. I can also hear the challenges within the figuration--counterpoint in the texture, long ties, altered chords, the sinuous appogiaturas, short cadenzas, Fauresque flights of fancy, and more.
I did listen to Michael's recording you included here as well, but I believe there is much to be said for both interpretations. The fact that you allow your personality into your playing is actually a desirable and very good thing. That's what gives your interpretation it's individuality. This goes back to the old saw that if you have any six pianists play the same piece with the admonition to strictly adhere to the notation and markings in the score, all six renditions will sound different!

If that were not true, we would live in an exceedingly boring musical world. Conductors are more apt to think orchestrally in terms of timbres and colors, which gives your playing another interesting dimension. Consider too that this nocturne is French late romantic music, so there can be a some romantic surge and a liberty here or there.
The noise factor on the recording is really loud. I suspect that you'd need not off-the-shelf editing software, but heavy-duty guns at a professional studio to try to clean up the sound somewhat. Up until a couple of years ago, I was still doing analog recordings too. Like you, I'm not a recording engineer. Then I made the leap to digital recording and am very glad I did. If you'd like me to go deeper into that, just send me a PM.
Thanks for posting this beautiful nocturne.