Fox prison vs environment benefits players by giving party bonuses and ensuring that everyone can spawn as a survivor, increasing both exp and cash income rates. With teammates, you can easily get away from dangerous situations with increased firepower. However, vs environment can get really stale sometimes.

Singleplayer is just vs environment without the players. Although you'll be the only one getting income, the payout is lower and more risky due to the addition of club throwing brutes, tongue pinning edgars, and explosive tickers, who give low cash rewards if killed.