If I had to choose between the 2 I'd pick the copper johns

BUT

For the same price, I'd go with the Cobra Sidewinder
It is close to the copper johns except also has adjustable windage and elevation without needing an allen wrench - "no tool" adjustments.
It also has 2 feet of coiled fiber optics for more light gathering and still has the bubble level the other 2 you mention offer.
It only has 3 pins however - whereas the other 2 you mention have 3 to 5 pins.

Just my biased opinion - I use the sidewinder and I like it very much!