The one on the left is Isaac Cuenca, a player from FC Barcelona B, and the one on the right is Rascon, from 1st of Batxillerat.

I only answer to win the ponit.
On the left, we have Isaac Cuenca, the football player of Barcelona, and finally we have on the right our friend Alejandro Rascon, a superstudent of 1st bachiller.
Teacher I hope that you will give me a point? :DD

Left Boy:
He seems older. He might be a football player. His nose is much smaller than the right boy.
The image seems extracted from a telly advert because the backround is completley black and he is iluminated by a light.
The camera is filming from below and so you can't see the whole body.
He is wearing sport clothes in light colours.

His neck is much more flat.

Differences between Alejandro Rascón and Isaac Cuenca.
A clear difference is that Alejandro is younger than the footballer, not too much though.
An obvious difference between them is the clothing they are wearing. The footballer is wearing an orange quite transparent vest over a short-sleeved shining yellow t-shirt. Rascón is wearing a black hoodie.
While Rascón is in a school environment, specifically, in a luminous classroom, Isaac is in a obscure blackground.
Even though they look alike, they have some different face traits:
Alejandro's nose is charper than Isaac's.
Isaac has sideburns unlike Alejandro.