Only few things changed, front and rear fascias changed, also interior has changed.
2010 LS sport will get new bumper and revised headlights, also mirror-mounter turn signals changed. Also it have new rims.
Talking about 2010 LS model, it seems that it have upgraded interior too - it look's that it will have a nigh vision
So as you probably already notices, rumors about adding sport package for LS in 2010 were true.
