Not many phones do. But a few have done what you suggest. At least slightly. The Galaxy s6 came in an active version that had like 30% more battery and better

Not many phones do. But a few have done what you suggest. At least slightly. The Galaxy s6 came in an active version that had like 30% more battery and better water resistance and a slightly tougher default shell. I don't know how their sales were for the 2 models but I hope they were good enough to continue the trend