My first thought was that the expression on the sable looks a little unsure, your comments verified it...
As these are apparently pups bred by your aunt, and from a white GSD....hopefully you know the parents at least....It does not particularly matter in this instance that the black and cream pup is an undesirable color as she is not breeding to any particular standard with a white female. I am guessing there are no titles or certifications on either parent either, but as she is your aunt, together you might be able to predict which pup is better for you....
The black and cream/silver probably will be more like CJ but lighter, and at this point has a more 'open' temperament. The sable should be handled and socialized alot so that it gains more confidence in people should you choose it.
Csabre Sch1, Hexe Sch2, SG Bengal, Lynx, Komet, Kira HGH & Kougar v Wolfstraum ~ Ziberia IPO1 ~ ATB Basha, Kougar & Kyra, Fenja, Sch3s, Cito, Sch2, Danger RH & Alice Sch1s ~Kelsey