Looking at this topic in general way, would you rather be incredibly strong or super fast? This involves the more physical things.
I think I'd rather be stronger than faster because strength is more of a useful life tool. Sure, you may be able to run everywhere but why not take a cab?
Just imagine to run super fast at someone, wit a bowling ball (20 pounds) Then imagine gitting them with the ball at 300MPH or so... Would super strenght achieve that..? I don't think so.
The strenght of a collision is defined by its momentum, so a hit thrown at high speed is most likely to be as hurtful if not most as a hit from someone who's just awfully strong. Then again, muscle power can help increase the speed of a movement so really, I guess it's all about what you prefer.
I'd prefer being fast, because I think it'd be pragmatically better. I mean, you could travel everywhere you like in almost no time at all, think about it. Besides, in a fight, the speedy would most likely have an advantage because he'd be able to dodge whereas the strong would only be good to stand the hits; no matter how you look at it, I think speed would triumph in the end.
Speed is more useful than strength. Sure you could do a million things, but could you do those million things in half a second? I think not. Anyways, I've learned enough from RPGs that speed is very important to survival.