Is there a difference in Armor?

Hey! so im at the azerite armor vendor in zandalar and cant figure out what piece to buy. for 200,000 titan residium you can buy a 445 mythic 10 piece. BUT there are different type of the same armor. Chestplate, hauberk, chainmail, ext. Now, my question is. Is there a difference in the Azerite boost selections for the pieces, or are they all random? i know its not appearance as they all look the same ( other than shoulders, which have 2 looks ) at 200,000 titan i dont want to waste it on a piece that wont give me the best selection i could get. I think this is a question that could help a good amount of people. Unfortunately i cant post in general discussion for some reason. So here i am. Any help is appreciated. Thank you!