Vote for the DIOR!!!
The Miss Dior flap is a classic piece, from one of the best high-end fashion houses, plus very understated (unlike the classic Chanel flap with the CCs on it).
I rarely see the Dior flap being carried out and about. I mostly see the Chanel one. This makes Dior, IMO, more unique and exclusive.
However, if you cannot live without the Chanel flap (you refer to it a lot in your first post), then I suggest you start saving for it. There's no point on throwing 1500$ on a bag unless you ABSOLUTELY want it.