For a 2 teamer, you would be at a very slight disadvantage of betting a parlay. Typical parlay payout for 2 teamer is 13/5 or 2.6/1. If you bet the first game straight and won and then placed the entire amount on the second game at 11/10 odds, you would have 2.645 or $4.50 extra per $100.
For a 3 teamer it is the other way. Betting a parlay pays 6/1 while betting each game separately will yield 5.96/1
Hey, every little bit helps! LOL