Agree with Dudefish.
My expectation would highly depend on the tank size.
In a very large tank of say 5000 gal they may not be aggressive to each other at all or may quickly and rather painlessly establish pecking order. In a small tank, say 500 gal, it's a 50-50 chance they will fight substantially to, again, establish and enforce the pecking order.
This is about the hierarchal aggression. Territorial aggression appears to be rare among TSNs but the chances of this kind follow the same trend - the smaller the tank, the exponentially higher the chances. Predatory aggression is not an issue unless the size disparity is great. It's been known for 2.5' TSN to kill and eat a 1.5'-2' TSN.