Answer
From the past, lexus usually has a 2-3 year period where they will keep the model chassis relatively identical, after that they usually change the headlights, tailights, fog lights and wheels. but yes, annually, lexus does come out with new features but are, in my opinion, not enough to render buying a new car from one from the previous year which does cost considerably less. although minor issues that may annoy the consumer from previous years will be certainly rectified such as the rattling noise coming from the 2007 es 350 will most likely be resolved. in the end, both cars will be beautiful and both will be a nice decision if you should choose to buy a lexus!