Hoping someone else has already looked into all this very closely. What are all the differences between the 11" 128GB MBA Vs 13" 256GB MBA? Doing some quick research for an aunty who wants to buy a gift for my mother. Alas I don't have the time to painstakingly look into all of this... Is the only the difference display size & SSD capacity, or are there some other subtle (yet potentially significant) differences to be noted? Any well-informed advice greatly appreciated. Thank-you!