I stand corrected on the age, but it's actually more accurate to gauge a player on how many years in the league not age, nothing is more important than getting games under your belt in the NHL. What you are trying to do here is convince people there is a HUGE difference in age from what Parise did at 23 and what Kulemin did at age 24 and that one more year would have been huge for Parise's development, when he had already 3 full seasons under his belt, he just had a career year, nothing to do with turning 24.
If you want to go this way, Parise produces 0.81 points per game as opposed to Kulemin's 0.53, along with an Offensive Point Share of 31.3 to Kulemin's 9.4.
I like Kulemin, but this isn't even a comparison. They don't play the same position, they don't play the same style of play, the only thing they have in common is that they both have the letter E in their surnames.