It depends entirely on the recipe. This goes for all crafts not GSM, but every recipe of the same family seems to favor one or the other. You might call which recipes favor which stat to be a trade secret, but I think there simply hasn't been a public cloud-based resource designed to handle this sort of information. As an example, I tried to make twinthread this morning with both my Craftsmanship (194) and Mag. Craftsmanship (174) sets and the attempts with the Craftsmanship set were noticeably easier and obtained higher quality.

As far as craftsmanship-related gear goes, at least you can use the Dodore Doublet as a GSM! Us LTWs are stuck with the L30 Vintage Doublet Vest+1 as our Best-In-Slot for Craftsmanship, which only provides a paltry +16.