fairly easy to test this by yourself...if you have the expertise to spare.
take 1 or 2 tac doffs...skill them acordingly. go in orbit over earth and activate the abilities as you suggested. Whatever number is higher on a single weapon in your weapon trey when you hover your mouse curser over it is the winner.
Furthermore, beyond just simple numbers, TT1 gives a build more flexibility than TT2 or TT3; since some escorts have up to 3 ensign tac slots, whereas others have at most 2 Lt Cmdr tac slots, if even that. Some escorts, like the Defiant or HEC, have issues filling out the "third useless tac slot" so two tac teams, (*without* Technician DOFF's, mind you) fill that spot well.
The best part about TT is the shield redistribution, and that works the same for all versions.