Ummmm....disagree.
Both could improve, but right now Sano is superior to both of them combined, especially when he starts hitting. Because he will, and that's a guarantee. The other two don't come with guarantees.
Larnach and Kirilloff aren't rookies. They are 2nd year players who failed their first tryouts - one couldn't hit, the other couldn't stay healthy. Nothing has changed in either scenario so far this year. If this audition doesn't go well for Larnach, he may be sent down to AAA purgatory and may never make it back to the bigs after this year. Kirilloff's career might be in jeopardy if he can't get over this chronic wrist issue.
And you think they are both better than Miguel Sano, a guy who will hit 30 HR this year and who has done so many times in the past? I know hating on Sano is the cool thing to do, and it's low-hanging fruit, but c'mon. You have to be realistic.