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Originally Posted by talk2tiny
I realise that there's no reason to trust my credibility any more than anyone else who's posted here but if you're interested, I have degrees in mathematics and theoretical physics and have almost completed a PhD in theoretical quantum physics. I can assure you that from a purely mathematical standpoint, two solid objects travelling at 100km/h towards each other results in the exact same forces as a single object travelling at 200km/h hitting a stationary object.
It's all to do with relative velocities but I won't go into the details. Those who don't believe me yet won't be swayed by a proof either. Obviously I can't speak for the effects of crumple zones and glancing collisions etc but to answer the physics part of the question, definitely aim for the wall rather than the car.
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Looking at this with static analysis the outcome is different, as has been mentioned.
Eg. Having a force of 100kg applied at each end of a steel rod, for example, does not equate to 200kg of force in the middle.
Could you put up a bit of detail that shows how your analysis is different?