Is all basmati rice aged? I've read that the aging process is what
gives basmati it's aroma and flavor. I've also read that you have to
pay a slight premium for aged basmati rice.

Yet I've purchased some aged basmati rice from Sadaf which is actually
cheaper than Tilde's best basmati rice which is NOT labelled "aged."

Any rice advice short of "eat it!" would be appreciated.