Stock, no. They're very different cars. Subies aren't really made for stability at high speeds. They're made to be tossed around twisty mountain roads (by skilled drivers) and dirt hairpins, not so much racing down highways at 150 miles per hour. I drive my friend's m3 every now and then, and it feels very very stable on the highway compared to my wrx, but I would never trade him.
I like to think of it like this: Think about jets. On one hand, you have an SR-71 Blackbird, and the other, an F-16. Although the SR-71 is much faster (and much more stable at high speeds) than the F-16, the F-16 is much more capable of well, tricks