I play cash more conservative. No matter how well you are running you can be ended in one hand, and it effects your bankroll. Tournament you have settled in to the fact you have a set amount lost until you earn it back by making the money. Also in tourneys I will play some hands I wouldn't in cash to eliminate short stacks.

Cash games are more nerve racking and require a more disciplined skill set. Some cash players can't cut it in tournaments, and some tournament players get ate up playing cash games.