The version of this passage that comes near the beginning of the piece gives us a clef change before the E flat, which makes the passage much easier to play. The same passage that comes near the end of the piece is much more difficult with the clef change (albeit a copyists quick fix of an error) after the E flat.
This is what we have right before rehearsal number 3:
and this is what we have right before rehearsal number 30
What a difference the placement of a clef makes!
See if you can guess who wrote it. I'll give you a hint. It is an orchestral piece, and this version is from 1955.