The score says how it ended. xG says how it should have ended: it is the sum of the chances each shot was worth, not an opinion about the game.
The score matched the game: Freiburg was the better side by chances too.
Paderborn: +1.1 for the season (12 in the table). Freiburg: +1.2 (3). The gap between points and xPTS is built from matches like this one.