betprepare.com

I think Spain will dominate this game. The downside is the game from 2015 in the U18 competition, but Spain were in the lead by 15 after the first half back then, while Belgium are here without two of their top 3 players. But Spain were not as good back then as they are today, which is probably because they had a different selector.
The defeat to Serbia is the only stain on Spain't record since the preparations started, but they reacted to that by thrashing France the next day. Relevant games against inferior opponents: Portugal +33, Poland +25, Sweden +39. For comparison, Belgium lost a friendly to Portugal by 6, defeated Sweden by 10 here and lost to Poland by 22.
If we look at stronger opponents, Spain defeated France by 25 and 13, Russia by 13. Belgium lost to France by 16, to Russia by 32, stayed under 50 points. Spain dominated Belgium at that tournament by 78-36.
Another good option is the halftime handicap, but the overall handicap is a much better option. Spain are playing all the way, they have won the final quarters by at least 13 points, and they have wide bench and great rotation. Belgium lack the width and if they make rotation in the second half, when they see that they cannot win, that could also be significant.