Unity vs Unreal Market Share?

Question…
Unity mentions on their site that they have “45% of the Game Engine Market Share”, which to me seems like a very misleading number given that numbers that could be counted could simply be people who register for the engine and never use it (a very easy thing to do when they always had a free version available. They opposed this to Unreal which showed it only has 13% of the market share. I question how they got these numbers and how accurate they can be.
Epic, as an example, didn’t force most users to register for their product until UE4 came out, so even though they are comparing all version of Unity in these numbers, I would assume that UE4 is the only unreal engine they were comparing. I have also not seen actual facts anywhere about how many registers users UE4 actually has.
Does anybody have actual numbers for Unreal’s “market share” anywhere?

These numbers do not matter to me as a developer, because always tend to move to the most powerful engines and like to be current with what most AAA developers are using, so in that respect Unity is not even choice for me. But I have some colleagues that would like to move to Unity simply based on these numbers which I think is a little silly.

I faced the same issues in my studio. We ported to unreal mostly because its a pbr engine and at the time unity was not. I look at how beautiful games look with the engine, BioShock, the arkham series, dishonored. All made with unreal tech. They never restricted any part of their tools for more money either. Now that it’s free I feel that epic really stands behind their product. Their techs monitor the answerhub and they are proactive in fixing bugs or giving guidence. Much better than unity3d all the way around.

Market share does not really mean anything when your comparing an Apple (Unity) to Beef (UDK), The reason is if you have a read of the features you should see one is clearly superior and the other just limits you.

Unity ( single thread ) <<< SERIOUSLY i have seen modems with quad core processors.

Look at the games made with unity which many of them are all limited by the engine.

UDK ( thread safe ) << how many cores you got.

look at the games that are made with UDK all GRADE A

Choice is yours use a limited engine or use an Unreal Engine…