Interesting. A few other observations compared to the "S" line at least are:
Bass drivers look a bit smaller than 8" but it could be an optical illusion
Square cabinet verses Rounded
A bit rougher of a finish (ie..looks anodized verses painted)
possibly a different crossover design
Maybe no midrange isolation baffle
Obviously these are just speculations but I was just thinking of things they could do to shave the price down a bit while still maintaining the primary building blocks
I guess this is no different than say BMW offering a 1 series to allow the folks with a Honda Accord budget to now also consider shopping around for a watered down BMW for the same price.
In any event at least now I can hold my head high that my low brow "S" line speaker is no longer the bottom of the barrel