Preheat two separate zones on your grill, one at high heat and the other at medium heat.
In a small bowl, combine brown sugar, smoked paprika, salt, pepper, onion powder, garlic powder and cayenne. Sprinkle spice mixture evenly over pork chops, then rub it into both sides of chops.
Place chops on high-heat section of grill and sear for about 3 minutes per side; transfer to medium-heat section and continue cooking, turning periodically, for another 5 to 8 minutes or until internal temperature in thickest part of chop reaches 145 degrees. Remove from heat and let rest for 5 minutes.
Meanwhile, into a saucepan over medium heat, add all Vanilla Blueberry Balsamic Sauce ingredients. Bring to a boil, then reduce heat and let simmer for 5 to 7 minutes, stirring often, until blueberries pop and release their juices. Remove from heat and serve warm over chops.