Their entire laptop line is very confusing to novices and apple veterans alike. At least their strategy is. I am totally at a loss to understand how a trillion dollar company can not crank out a coherent and cohesive laptop line. Why not make a 12,14, 15" regular and pro versions? Or even 12, 14, 15", super light, regular, and pro versions?
I think that the answer really lies in them sticking to some corporate principles, that any obvious and simple route must be a trap for Apple, b/c nothing is easy and everything has to be thought to the nth degree b/c that's what Apple does. But they've been thinking about this problem for 30 years. The market is and forever will be segmented into regular and pro users, and some people who just want a super thin/light at each screen size. Not that hard.