You'll notice loads of other brand names turning into links around the rest of the site.
The adistars are a strange one. The have an amount of over pronation support in the heel/arch area, made with normal EVA foam (which is more solid than the boost sole so disuades the foot from rolling into the area), but neutral runners report that they are fine to run in too. I think the adistar choice will depend on whether or not you like the separated heel structure.
By the looks of it, I'm not the only one that finds the range a bit confusing. I think adidas could take note of the way asics does its website on which I can very quickly narrow down to the type of shoe I'm interested in based on running type, usage type and pronation type.
What do you want a lighter shoe for? Short or long distance?
My best guess (remember I've only tried Adios and Energy: Adios - fast/light, Energy - more foam for comfort (I use for recovery runs), Glide (if you don't like Techfit and want traditional upper), Adistar - a bit of support for over pronation, Sonic - an all round shoe.
I suspect any benefits the blades can give will be offset by the extra weight. They have been out for quite a while in the US but there doesn't seem to be a lot of buzz around them. I can't find any decent reviews of them with proper analysis. Most of the ones I've read are the day following launch, i.e. they used them once and then "reviewed" them I refuse to write anything up unless I've done 40-50 miles. If anyone has seen a decent review, let's have the link.
They feel great when landing on the heel in the confines of a small room, but I'm a "forefoot with heel dab runner" so I don't think they are aimed at me. Maybe they will be good for heelstrikers. The blue colour at the launch was cool though - want some race shoes in that colour.