it seems to me that you lose less condition after the game using the condition bonus
when using condition bonus i usually combine that with zonal and low press
when not using condition bonus i usually use man to man and occasionally high press
I think you give the answer by yourself

some facts
- in every (official)game there is a condition loss of 22-25%
- there is also a (small) role dice in c.l. of every player
I mean in one game your GK may loose -22% and a DC 24%, in the next game maybe the opposite.
It's very clear when you do a training in old version. Even if you choose 3 bars/practice match (total -18%) for all your team, you can see in the results that one player lost -16% and another one -19%. The 2nd player earned more gaining (in analogy)
- Also there is difference from game to game (depending from oppo i mean). It's not all exactly with the same loss.
- MtM and high pressing add more condition loss and that is fixed from the game (the only two orders that affect condition loss)
If I remember well, the total condition loss after a game, is about -40 if use both
- You can make a test in a friendly game vs the same team (low press & zonal), in one use condition bonus and in the other attack/def. and compare the results.