which one has better specs? 1) Tiffany's Round Melee 2.3 carat F color and VVS2 or 2) Cartier 1893 round solitaire with pave 2.1 or 2.2 ish carat D color and VS1 I love them both and can't decide. Tiffany's is a slightly more unique/vintage design but do like the idea of a D color diamond with Cartier. Don't know the exact price but b/f said Cartier was slightly more expensive. (maybe b/c of color?). Do you think there's a "visual" difference between the 2 sizes? ~Many thanks!!!!