Went to Long's and Hao Chi Lai to do a XLB head to head.

This is Long's

This is Hao Chi Lai
Clearly the Hao Chi Lai XLBs look better visually. The wrapper is thin but not too thin and the pork soup inside is way more flavorful. They also gave the proper vinegar, look at the color difference. one is dark like molasses, the other one is diluted and dull.

For authenticity, Hao Chi Lai wins it for sure. For that guangdong infused flavor, Long's is okay.