It is not the same. The owners of the one in Frisco are usually working there and are very nice. I've been going there since they opened ~10 years ago and still haven't found better burnt ends anywhere.
I love places like this run by locals in Summit. I try and stop by every time I'm up there. Their prices are a bit on the high side but I like to see them staying in business. Another place to try while in Frisco is across the street in between Walmart and Safeway, place called FoodHedz. Former Keystone Ranch chef runs the places and uses local ingredients. I think it's the most underrated place in Summit and again, always like supporting the local places.