A 2.5 goal total has no refund at an integer full-time score. With 2 goals, Under wins and Over loses. With 3 goals, Over wins and Under loses. That differs from a 2.0 line, which refunds both sides when the match finishes with exactly 2 goals. Compare the line before comparing odds; a better-looking price can cover a different outcome. These are educational examples, not the live line or a recommended bet for this match.