Well, this post of yours will likely start a flamewar, but Iām on the side of you with ColdCard, primarily because itās Bitcoin-only. āOpen Sourceā means a lot of things, and I think it shouldnāt be exclusive to the GPL3 purist language. But the Bitcoin-only focus of ColdCard means it wonāt try catering to the real fraudsters, the cryptobros. Hence, better security, EVEN IF thereās some level of code obscurity with ColdCard.
Besides, ColdCardās documentation is top notch in my book.