[Plextalk] differences between the Plextalk Linio Pocket, and older models of the plextalk pocket

Hi all Have just been reading an article discussing the difference between the Plextalk Lineo Pocket and the new Victor Reader and have been wondering what the differences are between the Lineo and the older Plextalk Pocket models such as I have? Just curious. Perhaps someone can point me to some kind of comparison somewhere? Thanx in advance Andre