it all depends on the speed
all these questions about difficult are hard to answer because of 2 things -
1 - they never specify the exact speed which you mean for it to be played at, and in these 2 cases, the primary difficulty is all about speed.
2 - everybodys technique is different, the ballade presto is mainly about wrist technique, if you have very fast octaves it will be easier, and the sonata finale is all about raw finger technique, and the same goes.
so in short - it depends upon the speed of each, and your technical strength and weaknesses.