A good opeator on anything will outperform both.
That said, what do want to know. Performance, reliabiliy, price, service? Both are good machines and have their advantages and disadvantages. I suggest you demo and price both and decide from there. One word of caution, don't get caught up in names. Just because a machine is a Cat, does not always means it is the best. I think Cat makes a good machine, but I know everybody is capable of engineering a good skid steer.