^Which were both marvelous, IMHO. Personally, I do like the EP, since the interludes were awesome, alternative Kimi ga and Kizuato versions were quite nice and Oblivious Fukan Fukei mix is one of the few remixes I've ever liked as much as the original (and with my fanboying over Oblivious, that says something). But that's me, or maybe you, or maybe other devoted Yuki followers - and even not all of THOSE would be up to buying the songs again for the sake of alternate mixing and a couple of short extras. And this being an anime tie-in, the KnK fanbase most likely contributed to the sales numbers of the original single regardless of having been Yuki fans or not - but if they weren't her fans in general, would THEY be expected to buy the songs twice? Even less likely (except maybe some hardcore franchise collectors, but I wouldn't count on them when defining the chart position).
Overall I think she did okay on Sora wa, she doesn't sound as mechanic and emotionless as I initially believed her to be (and taking into consideration, after watching/listening so frequently to The Hikaru, Master of Angst, I guess it's hard to match up to her standard of melodrama 
they just can't be compared to Kajiura-sensei's music...
Which one has better odds is an easy guess, I think. And I thought I was being objective as an army of pontianaks here... 
