There are long downswings in cash, and they cost more money in a little timelapse. You can control your mtt losses but not cash. I mean you can leave when you lose 2 buy ins, 10, or 20, but a downswing can go up to 50 buy ins, and last one day like one month. So when you lose every mtt you can easyly spot your mistakes, or aknowledge the bad beat, on a flip or a +EV shove. But in cash it's harder to aknowledge it, needs work and lot of reviews.
In mtts you can grow faster than cash, as you win a great amount when you get to the FT, but you need more luck than skill, as the variance plays harder.
So let's say that mtt is more fun friendly and it's softer to make profit, or not to lose that much, but you need to play a lot to get your skills in adequance with your winnings, while in CG it hits hard, and skill influences more on your results, but mtt or cg, you need a good brm, unles you're here for fun and to gamble.