almost the same, but not quite, visible is that the older model has a simple on/off switch, the newer model has a three-way switch (although of course one can very well ask oneself whether one needs this and what it does).
even on the quickmill site you can see pictures of the old and the new version: (see on/off switch top left as indicator)
http://www.quickmill.it/en... (new)
http://www.quickmill.it/wp-content... (picture of the previous model)