Though the pieces do have structural, harmonic and stylistic differences as well as quite different characters, they do share a common theme.
Another popular case, (and according to some, the reason why Chopin didn't publish it) is some motivic similarity between Chopin's Phantasie Impromptu and Moscheles Impromptu in E flat (
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Quite interestingly, it seems that Scriabin might also have been influenced by a Prelude of Chopin. See similarities between Chopin's op.28 No.6 and Scriabin's Op.11 No.4
Hard to give a definite answer to your question. The incorporation of a pattern in a broader sense, that a composer finds somewhere and decides to use consciously, is usually rendered unrecognizable, because of the peculiarities and the individual vision the composer has. The means might be similar, but the end is always different so that its impossible to say that something has been stolen/copied.
The Preludes are a unique case in Chopin's compositions, Schumann describing them as "sketches, beginnings of studies, or, if you will, ruins, a mad medley of eagle's feathers". Though just sketches, to me they present Chopin "the visionary", as they are a collection of brand new ideas waiting to be developed.
That Chopin's Op.28 has inspired later composers is certain, but it might not always be in a so obvious way.