It quite good algo less energy consumption. Less noise try mining hirocoin
the algo = less energy?? you are still posting this after reading the entire thread?
yes
compare SHA-256 mining with GPU to scrypt
SHA-256 was optimized to the bone with Bitcoin, it was over 99% efficient compared to a "perfect" miner that didn't waste any ops anywhere because it only had a few ops here and there that were necessary but not part of the algorithm
yet it still takes less energy than mining scrypt, when scrypt possibly isn't even as optimized (there aren't several competing scrypt kernels afaik, but for Bitcoin there was fatk, poclbm, diablo, etc.)