Tex my brother, I would like to know what this food chain is called? Hell I bet I can cook better tri tip in my backyard than most restaurants out here in California.
To put it shortly Tri Tip is regional cut started in Santa Maria here on the "central coast", there are 2 tri tips per animal that come from the bottom sirloin and it is triangle shaped. Tri tip usually weighs from 1.5-2.75 on average but 3-4lb can be found in the store as well. The most popular way to cook tri tip is on the grill over and open flame. I have done one in my smoker but I am used to the grilled flavor when it comes to tri tip. It is served in slices as you said, cut across the grain at an angle and I like my medium rare. It even looks like brisket slices when it is cut.
Id like to tell you how it compares to brisket, but being from California I have actually never tried a smoked brisket sliced. I am dying to try bbq brisket but no place in this city offers it. I am going to drive down to Los Angeles and try their bbq joints next month when I get my drivers license back. I do not think tri tip is as tender as a bbq brisket and if you place it in smoker it will be done much quicker than a small piece of brisket. I hope you enjoy the tri tip, it is a small cut of meat compared to a brisket. I think it is best served medium rare when it is still juicy and flavorful.