This is perhaps a silly question, but I would appreciate a URL or some 
other explanation.

A faculty colleague and I were discussing the differences between a 
supported enterprise Linux and any of a number of "beta" or "enthusiast" 
linuxes (including TUV Fedora).  A question arose for which I have no 
answer:  why did SL -- that has professional paid personnel at Fermilab 
and CERN -- select to use the present TUV instead of SuSE enterprise 
that is RPM (but yast, not yum) based, and has to release full source 
(not binaries/directly useable) for the OS environment under the same 
conditions as TUV of SL?  SuSE is just as stable, but typically 
incorporates more current versions of applications and libraries than 
does the TUV chosen.  Any insight would be appreciated.  If SuSE had 
been chosen (SuSE originally was from the EU and thus a more natural 
choice for CERN), what would we be losing over SL?
To the best of my knowledge, there is no SuSE Enterprise clone 
equivalent to the SL or CentOS clones of TUV EL.

Yasha Karant