According to the article I linked below, the hayloft scene is played very differently because he and Socha look so much younger.
"And they play the concluding scene of Act One, in which their characters lose their virginity to each other in a hayloft, as a sexual assault by Melchior which turns consensual: a darker choice than the smoother scene of seduction between the original stars Groff and Lea Michele, 21.
"Yea," Riabko chuckled self-mockingly. "They made me do things differently from Jonathan just because of how I look. If I were to try to be sexy in that scene, I think it would be too One Tree Hill."
He also acknowledges his acting has a ways to go:
"I know that I'm wrong on so many things, and there's so much room for improvement. It's great to know there's this upward climb. That's just something that really helps me to wake up in the morning."
If nothing else, he certainly seems ready and willing to work at the acting.
The Prairies' instant star