I very much agree with Arthur.
I happen to own both amps in two different systems. The Passion is better in all respects, no doubt about it.
However the YA 201 retains the YBA magic and is an unbelievable bargain in my view. I have it together wth its matched YBA Cd player and B&W 600 s3 speakers and the sound is shockingly good. With better speakers the results are even better.
Overall, if you are on a budget the YA 201, at a fraction of the price of the Passion Integre, is better value for money.
If money is not a concern then the Passion is just the amp, for life.
Demetris