I have Altima 2007
and my friend has Camery 2007

from experience point of view go for Altima it is better
has many advantage than the Camery
1- Altima 2.5 Camery is 2.4
2- Altima's AC better than Camery AC
3- Road stability Altima is better than Camery
4- Altima interior is spacious than Camery
etc

but please bear in mind that im talking about 2007 model