You heard it hear first folks! UC4 will sell more or almost double than Gears 4. at the very maximum Gears will sell 55%-60% of UC4's total sales. i am speaking about total and world wide sales.
after the news that Uncharted sold a total of 28 million units world wide, setting the NDC at an estimate of roughly 5 million, i think its very clear that Uncharted is a beast worldwide. and i have no doubt UC4 will grow from UC3. while i think Gears 4, just like Halo, will see a downward trend in sales. resulting in a big gap between the two. i also think gears wont be able to live of to the quality of the previous ones, and UC4 will trump it when it comes to that regard, helping my case.
anyways, there it is. you are welcome.