I think the SVT is wonderful in the snow. Im from Cleveland and last year we got 130ish inches so I got to experience the joy of snow alot.
Now I did previously drive a t-locked mustang in the snow.. Khumos were by far the worst.. On a dry day below 50' the would spin and never catch grip even on slight touches of the pedal. So I had to goto winter tires for it and it was still hell. That car was beyond aweful.
Thus the tour seems amazing after several winters in the stang. All the hills I never was able to get up before were now simple and easy to get up in the tour. Never had any problems with the tour. And thats with TOYO PROXIES for the tires.. (Which actually have pretty decent snow reviews/rankings on tire sites)