Aether density on Souce vs. remaining shards

[Zohar_Lahar]

I'm wondering how much the "soul density" or "aether density" of beings from the 7x rejoined Source really differ from never rejoined First shard. At first glance, 5.x gameplay barely makes any indication of this, since everything on Norvrandt is level 70-80, higher than most things encountered on the Source thus far.

I'm particularly curious as to what this means for wildlife and foodstuffs: would fish caught in the Rak'tika Greatwood ecosystem have less nutrition value than fish native to waterways on the Source? Same with the skybuilder stews made with meat from Kholusian rails intended for Ishgardian laborers.

Since the Warrior of Darkness can actually teleport between worlds with this stuff -- and I have sold things (mostly fish) from one world to vendors on another shard -- I can't help but wonder what unintentional side effects of transporting significant quantities of materials of different "rejoinedness" might occur....