For anyone who's priced this out, do you mind sharing how they compared? Not specific numbers necessarily, but like "The Frenchies were X times the rounds," that sort of thing.
I don't think it's that simple. I think that square ones will be common and cheaper but the custom cut curved ones to fit around corners will get you. So it really depends on the shape of the stone, size of the stone and the size of the halo and what the custom cutting job will be like - number of squares versus odd shaped diamonds.
And I think it also depends on whether you get baguettes that have been frenched or cut-from scratch full French cuts. The baguettes being the cheaper option IIRC