I don't even qualify as an amateur when it comes to music analysis, but I do sometimes hear similar contours across pieces. This is such a case. Is there any criticism that suggests an allusion in the first movement of Liszt's 1st piano concerto to the first movement of Beethoven's 5th ("Emperor")?
As I listened to both this morning, they seemed to share a recurrent chromatic buildup in the piano to grand orchestral entrances, even with similar rhythm — but each time Liszt has the orchestra hold back instead. I'm having trouble finding a score with numbered measures, but compare e.g. the first 7 measures on page 4 of this score (see video) and the measures where the orchestra comes in on page 8 (labelled 10) of this simplified score (see video), incidentally occurring around the same time in the two pieces. Something like this happens a few times, and the quieter passages also have a similar feel.
Am I out to lunch? Verstehe ich das nicht? :)