Which Pokemon version should you pick - X or Y?

When players think about the differences between Pokemon games released simultaneously one major difference between them comes to mind: version-exclusive Pokemon.

The best Pokémon games, ranked from best to worst

Pokemon Scarlet and Violet: All Version-Exclusive Pokemon and Differences - CNET

Starter Pokemon - Pokemon X and Y Guide - IGN

Pokemon X and Y Guide: Best Starters, Strategies, What to Do, Where to Go

Breeding - Pokemon X and Y Guide - IGN

Pokémon Timeline: Every Major Game in Chronological Order

Pokémon X vs Y - Pokewolf

Pokémon: Let's Go, Pikachu vs. Eevee: Which version is better? - Polygon

Pokémon X : Nintendo of America: Video Games

I wanted to know which Pokemon were X/Y exclusives so my friend made this handy diagram for me, I thought I'd share. : r/pokemon

Heroes - Pokemon X and Y Guide - IGN

Pokemon X/Y Starter Evolutions, Customization Revealed - IGN