The more expensive memory is their HK series, which they consider their premium memory. I would guess it has the best memory chips on it.
Their old HK 2x1 DDR2 800 sticks (the black ones) were some of the best overclocking RAM out.
Not sure if it is worht the $129 difference though.
A forum community dedicated to overclocking enthusiasts and testing the limits of computing. Come join the discussion about computing, builds, collections, displays, models, styles, scales, specifications, reviews, accessories, classifieds, and more!