How does Scientific Linux differ from Scientific Linux CERN?

Asking because it looks like SL CERN has released their 6.3 spin:
http://linux.web.cern.ch/linux/news.shtml#SLC63

On Sat, Jul 21, 2012 at 4:46 AM, Anne Wilson <[log in to unmask]> wrote:
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> On 21/07/12 05:42, Peter Boy wrote:
>> Am Donnerstag, den 19.07.2012, 11:46 -0400 schrieb Larry Linder:
>>> Different point of view: As a long time SL user - I am quite
>>> happy to wait until the dust settles and we have a stable
>>> release.
>>
>> +++
>>
> These two responses surprise me, so perhaps I didn't make my point
> clear.  I trust the SL team to backport or otherwise give me essential
> security updates.  I consider anything else as a bonus, not a
> necessity.  I, too, came to SL for stability above latest-and-greatest.
>
> Anne
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