Fortunately or unfortunately (I'm happy, my wallet isn't
), I checked them out today and picked up Heat/Element. I'm hoping to go back for Bright Side/Gallery Gal. I find these duos to be softer than the regular shadows, maybe even more complex in colour... they're pigmented and bold but soft.
I love Gallery Gal because it has a khaki-olive base with beautiful reddish-gold reflects/highlights to it... I can't stop staring at my hand! I swatched Golden Olive to it and I dare to say I like G.G. better than G.O., just because it has more personality (does that make sense?). I'm not ditching G.O. though! G.O. is also brighter and more olive in its base colour, but the reflects in G.G. ...
On a side note, Interview/Purple X I find to be the most "straight forward" of the min. e/s, but they're still probably softer than their permanent line, regular e/s counterparts.