I like that black sand look, but the wife wanted white - ugh! No worries about the live sand vs sterile sand. Anerobic bacteria (nitrates) needs Aerobic bacteria (ammonia, nitrites) to survive and aerobic bacteria needs an oxygen enviorment. Sealed plastic bags sitting on a self in a warehouse can't produce or store oxygen for very long probably not even 12 hrs. At best the die off produces ammonia in a bag. Exceptions being buying direct from a tropical distributor who ships overnite with heat + 02 packs in with it or you collect it tropically yourself - the problem with the exceptions is Protozoa.
At least with live sand everythings dead. With sterile sand your silicates will be higher causing diatom blooms but rinse the crap out of it and this will cut down it's lifespam.