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.
A draw, but Brest created more (3.65 xG against 1.31) — points dropped.
Brest: −4.8 for the season (11 in the table). Toulouse: −4.0 (13). The gap between points and xPTS is built from matches like this one.