Field of Ruin taps for colorless too, can be tapped with two and sacrificed to destroy another nonbasic and everyone ramps out a basic from their library untapped, so it's a multiplayer-friendly Wasteland
Evra isn't the best at this since we have more mana-efficient ways to drop our life totals like Selenia, Dark Angel and Wall of Blood
Reliable ramp and efficient fixing allow both commanders to enter play on curve and remain available after removal
Standard sets should be for Standard, especially given that we get Commander decks with every set now anyway
It comes down to prowess, flashback, and a lot of non-creature spells to play into the hands of both mechanics
Another gem from all the way back in 2002, Chainer's Edict was often able to take out the opponent's best creature, because that was all they'd have in play when you were casting it