Cash is easier to play in terms of time commitment. You could devote 10 minutes to a round at a table and be done.
As for strategy, in some ways I think tournaments are easier. Yes, you have to make adjustments for what stage of the tournament, and yes, you have to consider more than pot-
odds (ICM), but... in a tournament, you can also wind up short-stacked where the game is more about shove or fold, and that's easier to play.
Ultimately though, I think it's a matter of your play style. I'm just naturally better at tournaments.
And heck, look at Gus Hansen. Kills tournaments. And then lost something like $5M in cash games.