i think there are really nice moments in here, but notice that your chords are not always together.. you should work on your vertical touch to get a cleaner attack on chords.
with the prelude, i just feel you can go much deeper. there are hints of it, like in m.16 which is very nice, but overall, i think you're just a little below the surface of the potential. this is one of those meditative and ruminative preludes, like e-flat minor in the same book, that can sound monotonous if they don't have some kind of subtle variety.
the way i solved the problem is at measures 5-7 (till the thrd beat), and 13 (from the third beat) to 15 (till the second beat), is to play slightly slower, then move ahead afterwards. i'm not saying this is the right thing to do, it's my own subjective approach, but i'm saying you need to find something to organize the prelude as a whole, so the long lines come out.
i think you can do more with voicing, as in measures 3-4 in the left hand, and measure 8-9 in the right hand, though in measures 8-9 i can hear the inner voice so good job, i just think it can be more. that's probably also personal.
the fugue on the other hand i like better, esp. the tempo, and admirable voicing! the legato should be more perfect, but that's true with practically everyone. somehow i think there is deeper emotions here than i felt in the prelude.
even though this fugue moves in steady quarter notes in practically every bar, i actually think in your case it needs more vertical approach, by which i mean, more variety in the harmony from the combination of voices. the hard part for me in this, is to get the coloration of all the vertical harmony, but not plod along, and not lose the feeling of cut time. i think the passage at 67, the super-stretto, really tends to play itself, in the sense that it's really impossible to point out that the second half note of each entrance is both the ending and the beginning. so each half note entrance, is a beginning, and you can make each one a bit stronger than the previous, taking us all the way down.
if you're interested here is the recording ip osted of this:
https://www.pianostreet.com/smf/index.php?topic=47671.0