The special has the addition of a runny egg and more meat (I think?) vs the standard pork katsu don.

Runny egg makes it silkier and saucier and tasted better compared to the standard. Pork katsu was well fried; although there were some fatty bits that were hard to chew, overall it was tasty katsu. There was enough ingredients and sauce to go with the rice so I finished everything. Good enough for a re-purchase.