As mentioned on my journal post (link in original message), the three pix here are:
1. "resize/sharpen cascade" as you describe -- too clean! (good otherwise)
2. "nearest neighbor" resize which loses detail but carries the actual original grain, in terms of statistical sampling -- the effect is to amplify the grain pattern against the overall image.
3. "nearest neighbor" to a larger size, then an additional bicubic downsize, to carry detail and also maintain some of the (amplified, but not as much as before) original grain.
(Curious effect on my old Toshiba laptop -- a subtle purple hue in the first image! Apparently the gray of this laptop screen isn't uniformly gray at all luminance levels... interesting (and makes me glad I've mostly replaced it with a newer laptop))