I've owned both. Love love love the Rat 2, returned the Zancudo. The Rat 2 is about the perfect EDC, I just wish it had better steel. The shape, ergonomics, action, and carry are all top notch for a $30 knife.
Thought the Zancudo felt cheap, way too stiff, and hurt my thumb to disengage the lock. I liked the blade shape, but that was about it.