Okay, I have had both. The first deer I tested the TAC out on was a splke buck. Not my first choice, but I just had to see what this awesome shooting machine was capable of.
Now this ended up being the worse case scenario. The buck turned toward me right at the shot. I ended up dissecting the front shoulder ball joint in three pieces. The arrow entered the boiler room, went back through the liver and paunch, and exited the underbelly before stopping in the rear leg bone. Let me tell you, that is a TON of penetration. The broadhead was a Rage broadhead which broke on entry. I'm not too sold on these heads. Would another have held up to that same shot? I don't know but so far they have not been great for me. I just think there are better choices for me out there.
Back to penetration. That buck ran 60-70 yards before piling up. I put a NAP Spitfire Maxx through a nice doe, broadside through both lungs. She ran 75 yards maybe before expiring. But the arrow was buried in the ground 6-7 inches on the other side.
I think that if you use a broadhead with a smaller cutting diameter, say 1.5" or less, you will blow through anything on the North American landscape.