>>56368660Modest one is far better.
It has an actual ingredient finding boost and can cancel out its speed penalty at 25, and it's full corn.
The Careful one basically cancels out its only ingredient finding boost and isn't worth using, especially with sausages at 30.
I'd keep looking as well, but if you do manage to get that Stufful to 30 without investing candies (beyond evolution) it should serve your need for corn well.