May be I can tell you the standard grading on those pieces you have posted, and you may judge yourself? These are what I generally see on ABRSM, LCM, and Trinity.
Chopin Polanaise no 1, Associated Dip or ATCL
Chopin Fantasie impromptu, Associated Dip or ATCL
Mozart K332, Licentiated or Associated Dip; its 1st movement appear in current grade 8 syllabus of ABRSM
Schubert's impromptus is a popular choice in Associated Dip and Liceintiated Dip
Beethovan's op 10 no.1 appear in ATCL or Associated Dip
Fantasie actually is not as difficult as one thought, but as I observe from my experience, very few student can play it well. Delligent student can even play it when they come to Grade 5 and above.
Well, go and figure out yourself.