Red Oni, Blue Oni/Meta

Examples of in  include:


 * Tropes wikis (r) and The Other Wiki (b)
 * Deconstruction vs. Reconstruction. Simply put, former mostly uses Wham! Episode, latter mostly uses Rule of Cool.
 * Series-wide example: Final Fantasy vs. Shin Megami Tensei. For latest game comparisons, look no further than Final Fantasy XIII and Catherine, respectively.
 * Pokémon vs Shin Megami Tensei is a good one too, since they both have a Gotta Catch Em All theme.
 * Another series-wide example: Don Pachi vs.Touhou.
 * Inverted: Sonic the Hedgehog vs. Mario.
 * Unreal Tournament Vs. Counter-Strike.