You may have missed the 2010 mild facelift. Looks slightly different grill, bumper, headlights and wing mirrors. Different brakes, digital dash. And the big ones for me DAB radio, Bluetooth music and access to full phonebook. Probably a number of other things to?
Had a 2007 LS600 last year and now have a 2010. Couldn't do without the dab, phonebook or Bluetooth now.
Half thinking about a facelift 2012 next but personally prefer the look of the older car.