Palladium feels very lightweight while platinum has a lot of heft.
Palladium turns into a very dark gray over time while platinum is a lighter gray over time. I find that palladium shows patina sooner than platinum though.
Palladium would be my last choice. I'd do 18K before that, though I am not particular when it comes to choosing between 18K and platinum myself. I like both.
My FF fiance is going to freak out when she sees this thing
Thanks so much for your help and advise, I am confident I made a very sound purchase and it's all because if all your help! I started many threads and talked through many things with you all