NAYA Tron The differences with GW or RG are in manapool and in sideboard.
This changes improves difficult MU like Infect, Affinity and generally Aggro decks where GW often is suffering.
Obviusly having spells like Relic, RIP and PTE we have a good coverage against graveyard-based decks.
I play 2 types of painland in maindeck so I have more Green mana to spend to cast the tutor and the possibility to play Red spell after side.
No fastland because I don't want tapped land turn 4 or 5 when i would cast Ugin or Ulamog.
Our painland will damage us often 2-3 times but we will be happy to pay live to cast removal that will save the game.