In this scenario there are different ways an asteroid could enter the Earth's crust but does the aftermath differ? Think of the surface of the Earth as thin sheet of ice and the magma the water underneath much like an egg. Would an asteroid, the size of a small city 10 miles or more wide necessarily wipe out the Earth? Would most of the force go strait through the crust and the impact be absorbed by the magma? Would the shape make a difference like hitting flat like a belly flop compared a smooth entry like a Olympic diver with no splash? Would an asteroid hitting the Earth at steep angle cause the Earth's rotation to slow in half or more?
There are many questions on this but the main answer I am asking is with the right angle of impact, shape and direction of impact make a difference if the same asteroid would equal extinction or not?