If the prices are close, I'd buy the Corsair. Both have the reputation for being high quality, corsair more so, but Micron memory hasn't been sold under the Micron name for awhile now. Micron is now Crucial memory, and if you're seeing memory advertised as Micron, methinks it could possibly be older. All memory is pretty cheap these days though, if I were buying memory I'd either Crucial.com or whatever was cheapest and guaranteed to run Cas latency 2.