I agree that it is pointless to ARGUE difficulty. But I think we were agreeing that the 3 concert etudes are the easiest. However, the 1st of the 3 is played over a period of 10 minutes. Playing any piece for this amount of time is some serious concentration power. 
So yes, I suppose when I stated my preference, I compared musical value based on personal preferences and ear. And I am so sorry to have been so rude.

You clearly said the Paganini etudes were easier than the concert etudes so that's where I am disagreeing.
The violin is fully capable of creating harmonic structure.
No one called you rude, where is that coming from? I am
Simply disagreeing with you, no attack on you personally just a difference of opinion.
Sorry for any flares coming from me, I am not meaning to be rude. I just disagree with you here on something that has nothing to do with you as a person.
To the OP
I agree with FF to grab another Chopin op.10 no.12 is not a great choice.
Look at op.10 no.11 or 10 or 7 or 4 or 2 or 1 look at op.25 3, 4, 5, 6, 9, 10-12
For your second etude I think you should find one that you enjoy and that has plenty of challenges. For an audition I do not think it would be wise to throw in a popular one. It's also not smart to use a super unknown one I.e alkan, liszt is a good choice take a look at Paganini etude no.4 second version. It's all chords, look at that and if you can nail it... Then I will have a great amount of respect for you. Musically and technically that ones a beast.