here are my notes - just quick impressions and no scores, since I'm not an experienced sencha drinker.
C - tastes like sencha. enjoyable but did not stand out from the rest
S - thickest of all the samples. soupy, briny, oceanic. pleasant, slightly sweet aroma
Y - thick and briny like the Sae Midori, but to a lesser degree. much sweeter. very pleasant honey/peachy aftertaste, very sweet aroma, especially in the dry leaf. smooth and buttery like the Kirameki
M - slightly briny; eggy aroma and flavor. thought I smelled/tasted roasted potatoes? has elements of both fuka and asa.
A - sweet, eggy, and slightly grassy notes. not briny or soupy like the heavier steamed shinchas.
K - the clearest and brightest of the samples. very smooth, buttery, eggy, and sweet. difficult to make a bad brew. my favorite of the samples.
After round two, I think I enjoyed the Kirameki and Miyabi the most. Miyabi was nice because it cut down on the heavy briny flavor of the fukas while still retaining that rich, warm aroma and flavor. Fuka in general sits heavy with me, but the aroma of the dry leaves is just so wonderful. Yutaki Midori was by far best of the fukas. So probably, in order, my preference is K, M, Y, A, S, C. That would make Miyabi the best value by my tastes, I suppose.