For me... JYD II CB.
The main differential reasons why I prefer the JYD II CB to the Tyrade:
Not a fan of assisted openers. Seem like a good enough idea, but actually not that good from a safety (having the blade under spring tension can have unexpected results at times) and flexibility (no inertial opening with assisted openers, can't open easily from a reverse grip) standpoint. The JYD II opens just about as quick and easily as any assisted opener. Smoooooth...
Reverse curved blade. I don't need the headache of trying to sharpen that reverse curve on the Tyrade with my benchstones. Maybe if I had a sharpmaker or other system that could make it easier, I would think differently.
Looks. I like the pattern of the join between the two steels better on the JYD II. Not a fan of the wavy, splash pattern of the Tyrade.
My tiny knocks on the JYD CB II:
No reversible clip. The clip on the JYD is a little over the top in looks, but I find it functionally works well. I kinda like the slightly thicker blade of the Tyrade.
The JYD II CB and Tyrade are pretty darn close to each other, but the given the above differences, my choice is the JYD II CB.