kawai es3 versus kawai es100

I need to purchase a digital piano and, looking through the various possibilities, I am undecided whether to aim for a new Kawai ES100 or a used Kawai ES3. Assuming that the condition of the used one is excellent, and taking into account that we are talking about a new product versus one that, although in good condition, would have its years, what would you (who surely know more than I do...) recommend I orient myself towards? For their price range, are there pianos from other brands that could be equivalent in terms of quality? Thank you.