Question about condition loss and skill gain

[VFK]

Is the amount of skills a player gains from a match decided by the minutes played, or number of condition % lost?

In other words, let's say I played two matches with different pressing & marking instructions. Would a player who loses 30 % in the first match likely gain more, than in another match where he lost 20 %, even if he played same full 90 minutes in both?

It's pretty hard to work out because there's so much variance of skill gain between games. I never paid attention to this before the last few days, so I don't yet know myself.