I disagree with the claim that model m's feel stiffer or require more force than clears.
The thing about clears (or really any cherry boards, but really the heavy springed ones) is that you're pushing down on a spring directly. If you're used to bottoming out, then you are compressing these springs to the maximum amount. The longer you hold it down it continues pushing its maximum force on you. This is why I find it annoying for gaming because the activation point on the two clears boards I have is below anything that you can feel, so I can't just ride the bottom of the bump. After awhile it gets pretty annoying.
With Model M's, the spring falls sideways which is what gives you the sound, the bump, and the activation (when it should happen, btw). Since it's basically bent over at that point it requires nothing to hold it down, and it doesn't matter if you bottom out or not at that point. So I'd say that they are easier to type on.