The one that costs more has better timings; so it is slightly better.
I doubt you'd actually noticed a difference.
thats what I was wondering, does it make a noticeable difference.. I was thinking it does not.
Something else I was thinking, wouldnt it be better to get the Cas 8 for upgrade reasons, like if I was to add another chip down the road... The Cas 7 are kinda rare from what I see, might be hard to find or discontinued by then.