In addition, UE4 is fairly new, so there are not as many books/tutorials/assets/etc. surrounding it as Unity.
As a total newbe I have been "playing around with unreal" for the last few weeks. As said above you can throw out a simple game in about 5 mins. However I have been having an horrendous time trying to import fbx files that are also interior. On the inside the walls are invisible. I've surfed for hours to try and fix this problem but non is forthcoming. I'm going to throw my hat into unity and if it can inport an fbx file without all the bullshit (invisible walls) then thats where I will nest.
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