If I’m reading your post right; you’ll find tons of threads about it on the forum, the difference in power on road v TT bikes. My take on it: the TT bike / position closes your hip angle and you can initially deliver less power but its more aero so should be faster than a road bike. Some folk with training can develop the power and close the gap between road bike power and TT bike power however. There may also be a sweet spot of road/tt bike to deliver optimum power.
Power out of the saddle Vs seated Vs TT position - Training - TrainerRoad
Same power in your TT position as in your Road position. This is how - Equipment - TrainerRoad