When my uncle bought his 2010 V6 Camry, he remarked how smooth and powerful the 3.5L V6 felt - and that the 2.4L felt underpowered, especially for passing on the highway. But now that Toyota uses the 2.5L instead of the 2.4L, I wonder if the extra power would have changed his mind. I suspect not, he really loves that V6.
Ironically, he said that was not the case when test driving Altimas - the 2.5L had sufficient oomph, and while the 3.5L V6 had more yet, it wasn't nearly the difference as the 4- to 6-cylinder in the Camry. If he had decided on the Altima, he would have gotten the 4-banger.
To be fair, Nissan does have a relatively potent 2.5L. And I wonder if Nissan's CVT is dulling the response of the V6.