Some people actually prefer them over the 858SG's, and they are 'close, but no cigar' ... as far as I'm concerned.
Nothing in the Fuente sun-grown lines compare to the 858SG, but that is just my tastes. The 858SG has a more complex blend of flavors, and is smoother ... and the Cuban Beli has a different flavor profile, and has quite a bit more punch to it.
It's definately an outstanding cigar, by any standards, and although it can be hard to locate ... it is certainly easier to come by than the 858SG!