skillsets of technical vs non-technical co-founders?

The only difference is technical founders have technical skills and non-technical founders don't. There is no magical divide. Many cross it and I was one.

My first two endeavors were purely non-technical brick and mortar businesses. Then, I wanted to expand my capabilities, spent some time learning to code and went on to work as an engineer for a few years.

Now I'm a "technical" founder and am building a different sort of business. But I'm still me. I didn't give up any of my old skills to make this change. I just added one more.