The only possible address to file I-140 by itself outside the U.S. is Dallas, TX (USPS)/Lewisville, TX (Fedex/UPS). And the only place to send the RFE response (which this was) is Irving, TX. All I know, the same officer could have processed both of them. It's all a crapshoot.
Originally Posted by
FourStripes
Also the timing of your NIW case plays a big factor as well and if it was transferred to a Service Center that is known for turning down NIW cases. lots of variables to consider. Mine got transferred to NBC in Missouri and got approved.