An Intel Xeon E5 1660 would be fairly comparable, but would probably set you back more than twice the amount the i7 would cost. Can’t you order from somewhere else? I just got two Hexacore Xeons (for my server) delivered to Sweden from the US because I found a cheaper store there.
Well, better than i7-4930K. Both will run UE pretty much flawlessly, with other heavy softwares running at the same time. Compile times will be very fast with both.