It's more of a label difference
the money went into interior material quality, and exterior design.
The main reasons lexus s (lexi?) are more expensive than toyotas is the extra luxury options you can add.
For instance, a fully loaded XLE V6 and an ES350 will be quite close in cost as well as features. But for the lexus, there are alot more thing you can add, while the camry is all optioned out.