Personally, I think that Corsair USED to make excellent RAM, but something has changed, or everyone else has just gotten better, and they have just stood still banking on their reputation of high quality to carry them on, but I don't share that opinion anymore.
In recent years, I am more of the opinion that it is over priced junk, that needs high voltages, and runs too hot. If you don't believe me, look around and compare. Corsair memory with the same timings of many competitors needs higher voltages to run stable. In my book, higher voltage compensates for lower quality memory. I cannot recommend Corsair to anybody since about 2 -3 years ago.
I would go with the lower latencies over the higher buss speed in your first post.