I’ve got two boys, two years apart, in the same level this year. Younger son has more natural gymnastics talent, although my older son is coming into his own now that he is starting to get stronger (puberty).
My older son said one day that he wished he was as strong and flexible as his brother so that he could be a better gymnast. I said, ok, but remember that people come as a package. You can’t pick and choose a handful of traits from someone else. There’d be trade-offs.
My older son is very creative, excels in language arts, and is naturally charismatic and able to “work a room.” He’s very proud of those abilities he has. His brother doesn’t have those traits and skills (he obviously has other strengths, but also his own weaknesses).
I asked my older son if he’d really want to be like his brother strength / flexibility-wise if it meant taking all of his brother’s other traits (and losing the special mix of things that makes him HIM). He thought for a moment, then said, “Nah. I’m happy with the way I am.” He has never said or done anything that even resembles jealousy since.
Gymnastics is important to them now, but life is much more than gymnastics. In the long run, relationships with siblings will outlast any sport.