So, betting on the moneyline in sportsbook is actually less risky and more profitable.
CMIIW, but technically it depends on how the games turnout.
In both cases he's risking $100. The pacers already lost few hours ago, so if they are to win game 6 he will be getting $150 approximately, but from the even bet he'll get $200 as that's for pacers to win any of the games.
It's always advisable to stick to what you're comfortable with however when unsure and not make random bets with strangers online.