Issues : Errors of FC

b. 1

composition: Op. 28 No. 16, Prelude in B♭ minor

6 accents in A (→FE)

No marks in FC (→GE)

6 vertical accents in EE

..

In this bar Fontana overlooked all performance indications except the slur, i.e. , pedalling markings, accents and the staccato dot in the bass.
The change of font for accents in EE was an arbitrary decision typical of that edition. 

category imprint: Differences between sources

issues: Errors of FC

b. 1

composition: Op. 28 No. 16, Prelude in B♭ minor

Pedalling in A (→FEEE)

No markings in FC (→GE)

..

Fontana overlooked the pedalling markings (as well as almost all performance indications in this bar).

category imprint: Differences between sources

issues: Errors of FC

b. 1

composition: Op. 28 No. 16, Prelude in B♭ minor

Staccato in A (→FE)

No mark in FC (→GE) & EE

..

The missing staccato dot is an oversight of the copyist and the engraver of EE.

category imprint: Differences between sources

issues: Errors in EE , Errors of FC

b. 1

composition: Op. 28 No. 16, Prelude in B♭ minor

in A (→FEEE) & GE

No indication in FC

..

The absence of  in FC must be the copyist's mistake. It is unclear on what grounds that indication was added in GE – most probably it was a particularly opportune revision.

category imprint: Differences between sources

issues: GE revisions , Errors of FC

b. 4

composition: Op. 28 No. 16, Prelude in B♭ minor

..

In FC there is no accidental before the 2nd semiquaver in the 3rd group. The structure of the figuration and the  present two notes further (as well as analog. b. 20) made the reviser of GE realize the mistake of the copyist and add a

category imprint: Differences between sources

issues: GE revisions , Errors of FC