Yes, in theory, but all engines change over time, granted it can be minuscule, but they may not all have identical parameters. Anyway, my point was, if you wished, just as an alternative suggestion, not to dismiss tuning boxes completely or to insult some sensitive folk that may have them :-) , to consider a custom map on a dyno, as in my case, Joe was able to run full diagnostics for exactly my engine and then tweak for what I wanted, eg dont squeeze every last bhp out of it, favour a smooth torque curve, remove the torque limiter in the 1st 3 gears, etc, and it was about the same price.

It worked for me and was a suggestion. Horses for courses.