They're about equal, but their playing style is quite different.
GHEIST rely more heavily on hard-hitting cards with higher risk but also higher reward. 2HKOs is usually the way to go.
Roots have a more balanced set of cards where you will usually win simply by increasing the life gap and not necessarily KOing your opponent. Rico, Noodile Cr, Gertjan and Yookie make up an extremely powerful half deck with only 12*.
*cough* *cough* Gertjan is support: card *cough* its useless on halfdeck *cough*
Roots has only kickass DR's and some good elo-banned characters, and some usable star-cheap cards.
Since this game is about eating opponent's face GHEIST wins as clan - Tho GHEIST has lower base power than Roots so you can use Roots to fight effectively GHEIST. Against everything else Mono GHEIST > Mono Roots.
Gertjan can even be used in half deck IMO, he's that good. Just cause they're support cards doesn't mean they can't function at all in a half deck. Just look at Shann, Thormund, Emeth, Troompah (admittedly outclassed by Askai, but still good), that new Skeelz guy, etc.
Urban Rivals | Free Online Manga Trading Card Game | TCG | MMO
The Urban Rivals team is made by lovers of all kind of Collectibles Cards Games and Trading Cards Games like: Magic the Gathering, Dominion, Vampire, Yu-Gi-Oh!, Pokemon, Wakfu TCG, Assassin Creed Recollection, Shadow Era, Kard Kombat and Might & Magic Duel of Champions.