The 4720HQ was introduced at the same price as the 4710HQ $378, just because Intel still produce and ship a CPU does not mean it has not been replaced by another model taking its price point.
That's my point, Intel were still producing and shipping the 4700, 4710, 4770 when I purchased my notebook with 4720. So from Intel's inventory of mobile Haswell chips at the time of purchase mine was 3 tiers up.
This is beside the point really as everything else in my post in much more important. An quad core I7 is much of a muchness when it comes to gaming.