Originally Posted by Roelof

Does it matter if it has a light cooling head? (just a few grams)
Does it matter that it has a lowered head? (comes most of the time with more heat in the engine)
Does it matter if it has a steel or a ceramic bearing? (most drivers can not notice the difference)

You have to think about the engine itself and not the gadgets which comes with it. If you are no fast driver all those gadgets will not help to get you close to the toplevel drivers..