Hard to draw a line between what's parodistic and satirical and what not, when making comparative advertising. I don't know what law you're referring to, Bruno, but it seems to me that would be non-applicable to say the least.
The whole PC industry could have sued Apple for implicating that PC products are all boring and sad compared to Apple's. Apple's commercials, in the first place, where obviously parodistic and satirical, and did not really contain any objective or measurable technical info.
I actually remember Apple built an entire commercial on the unpleasant Windows Vista feature of asking users for confirmation way too often. And yes, that was a feature: it could be disabled in few clicks for good since day one, or somewhat tuned to be less invasive - albeit not as in detail as today; again the commercial was, essentially, a "joke": satirical and parodistic.
Personally, I love comparative advertising, maybe because here in Italy they are at the boudary of legality and so few take the risk of making one.
But these (Apple's, T-Mobile's) type of commercials in particular, while perfectly legal, are often not really comparing anithing comparable, and are inherently smug. They make me tend to dislike companies that use them, rather than see their point; I find it unwise and unpleasant to make fun of those who disagree with your view of the world and make them look stupid or silly. Pointing out at objective, technical features without adding the "I'm cool as a person, your're not" message would be way more elegant, intelligent, and respectful.
I mean, when I saw Apple's commercials I had the same reaction I had when I heard personnel at Apple Store being called "geniuses". I laughed at them! They lost many points with me (maybe I am smuger than Apple... ).
But again, it is not illegal to be smug.
I find t-mobile is actually making fun of Apple. Not its products maybe, bu its commercials.
And yes, she's hot.