Sorry for my formulation, it is not my first language indeed.Cordovan is not a color, it’s the material.
There’s burgundy and there’s color #8 and then there’s brown. There are also various other colors including black (please, I don’t want to hear about how black is not a color).
If you’re intent on buying a loafer, in my opinion either will work. A loafer is not something I’d wear with a suit so my thoughts would straight away go to a more causal outfit.
And I agree with Peak & Pine; the question is poorly worded and I would only hope that English is not your mother tongue.