What is apparrent from this view:
Edge Alignment.

• Relatively flat central belly area.
• Straight through engine air path (which implies radar blockers, as in the F-117 and F/A-18E/f).
• The flaps on the leading edge of the leading edge extensions.
• Metallic skin on rear portion of engines.
• Su-27 style “stinger, with a relatively large radome.
• Landing gear appears robust.
• Trapazoidal (stealthy) air inlets with splitter plates.

I think that the metal on the rear fuselage around the engines are an indication that whatever signature reduction techniques that they want to apply, they are not all on this model, so it reinforces my earlier assessment that this is not a representative prototype, but rather more of a validation model for the configuration.