@melm: Actually, the Aries 1 came with the aluminum/lead/Delrin platter I above described. Honest, I’m looking at mine right now! By the way, the TNT-3 and -4 came with the exact same platter (the TNT-1 and -2 came with the same Delrin platter as the Aries Black Knight). You will recognize Delrin by its black colour.
For the Aries 2, VPI switched to the frosted translucent-white Acrylic platter (and inverted bearing), which has fallen out of favour with both VPI fans and Harry Weisfeld himself.
For the TNT-5, VPI switched to the 15 lb. platter some hard-core VPI aficionados prefer above all others: a bottom layer of stainless steel (5/8" thick), topped with a 7/8" thick layer of Delrin. I know that for a fact: I have one installed on my HW-19 MK.3.
Neither of those two platters may be used on the Aries 2, as both had the non-inverted VPI bearing. The Aries 2 requires a platter employing the inverted bearing, like the Classic platter, or the platter that came after that stock in the TNT-5, the "Super Platter". It is comprised of a stainless steel center, with a layer of Delrin top and bottom. And an inverted bearing.