My Publix butcher has told me they are similar, but every time he has a Tri-Tip he calls.
I reverse sear Tri-Tip or Big Sirloins, meaning marinate them and gently smoke them until about 125 + or - internal and finish on a very hot fire, to seal the deal! we like our Medium rare.
Weber Spirit E-310 Gasser
1 - Big Green Egg - Large
2 - 22.5 Weber Kettles
2 - 18.5 Weber Kettle
2 - Super FAST, Super ACCURATE Green Thermapen1 splashproof)
"A good friend will come and bail you out of jail, your best friend will be sitting right beside you on the bench saying "What a Ride!" WooHoo