Definitely, and by a large margin.

If I said Mars combines the warmth of Antarctica with the moisture of the Sahara, the air pressure of the peak of Mount Everest, the environmental quality of a superfund cleanup site, the surface illumination after the 1883 Krakatoa explosion and subsequent volcanic winter, and the UV radiation from a completely destroyed ozone layer…

…if I said all that, I'd be understating how harsh Mars is.

The most positive thing I can say about colonising Mars is that the mere ability to actually do so will mean being able to recover from any possible catastrophe that comes our way.