The sentences are very different (7-10 years to 42 years), but to be fair, the crimes are also different.
1 time might be a "mistake", 2 times is a trend. Also, I don't know the specifics. I know children are not legally able to consent to sex with an adult, but I would punish harder in the case that the child doesn't even "consent" to it. Maybe the boy "consented" and the girl didn't. Also, I assume the "young woman" is an adult, so she definitely didn't consent.
Shocking. A generation that was told since childhood that gender roles are so important that they actually change your gender gives importance to gender roles. Absolutely no one could see it coming.