Ahh! Hikari is not the japanese version of Simple and Clean! Their diffrent songs! Also, I like Passion better and I think a lot of more people do becuse of it sounds better put together.

The whole song blends in more and isn't as solid as Sanctuary. There's a good word for this... got it! Passion flows better than Sanctuary! XD Mainly because of the number of syllabels in the lyrics. Like:
In you and I...... (4 Syllabels)
Omoidaseba Haruka haruka (14 syllabels)

Utada dosen't have to say the japanese version to sound close like she says:
In you-and-I...
But the japanese she can just say freely. XD OF course, people like Sanctuary cause its in English! XD