Does this laptop outperform this desktop?

Desktop.
First, laptop would beryllium too heavy to carry around everywhere. It would be like a floating desktop computer only.
Next, despite great hardware specs, there might be problem with laptops GPU/CPU overheating. Typically, laptops do not use whole CPU power all the time, so they enjoy time to freeze down. If game is graphic -intensive, you might need serious cooling after half an hour/hour of gaming. Merely that depends on laptop purely.