Not bad, but it looks like you’re using OpenGL normal maps when Unreal is expecting DirectX ones, causing fine surface detail to look like it’s pointing in the wrong direction. You can fix by editing the texture settings and checking “flip green channel”.
Basically, two different render technologies approached normal maps in a slightly different way: one decided to map the green channel with zero in the top left, the other with zero in the bottom left. Switching between the two formats is mercifully easy: you just invert the green channel of the normal map, which UE4 can do automatically if you check the right box.