Both my '07 XLE-V6 and '07 TCH have a flashing "Security" light next to the clock when the cars are off and locked.
The XLE has also has a transparent sticker on the driver's side window saying the XLE has a Auto Security System but the TCH has no such sticker.
From my perspective I see no difference between the two cars security.
Neither car has any PIO security option. Everyting is stock as it comes with each's model level features.
What, if any, subtle difference warrants the XLE getting the window sticker and the TCH not?