That’s certainly up for debate. Thinkpads are some of the most rugged laptops available, and their top models are made from magnesium alloys or carbon fibre. Only their lower end E and L series are ABS builds.
In my personal experience, my MacBooks look much less shinier/worn out in the palm rest areas on either sides of trackpad compared to any windows laptop I’ve owned, which include an Alienware R15.
I don’t know enough about material science to have more than empirical data or correlations, though.