Sure, that's just one single match. And most likely the Link player is worse by comparison than the Young Link player. Remember that Link has the range to drive Young Link away, as well as the knockback to keep the latter at bay.
And let me elaborate on the trajectory a bit more; Young Link's trajectory options are mostly horizontal, and much less vertical, save if you hit the opponent close to Young Link's body. When the opponent is hit by Young Link's dash, they are sent further, and can probably tech before Young Link could reach them. Also, his Down Smash is a semi-spike reminiscent move, where the opponent can easily tech out of it and come back to punish Young Link. Link does not suffer these problems, in which he can make the opponent go vertical, horizontal and diagonal, and still be able to combo them, whereas Young Link, with his horizon focused attacks, can rarely set up combos, and if he is able to, the attacks are still weak and short ranged.
Young Link also suffers the "Roy Hitbox" effect, where his inner hitboxes are better than his outer; even his F-tilt and Dash are considerably weaker at the tip of the sword. Link, on the other hand, doesn't have "power differentiated hitboxes", so that his whole sword is just a singular hitbox with usually the same output of damage anywhere.
Personally, I'd like to see first-hand, a professional Young Link player fight me in a regulation-style match, while I play with Link. We will then test out the match results and see if Young Link can actually withstand the man he's based upon.