Here's what makes the difference real
If any part of that creature's head is higher than the bottom of the bar (that is, if it would hit the bar), the creature is a legal target
Theyre usually a little bit easier to get your hands on too, because you can just buy an entirely new deck
Ashroot Animist Rarity: Rare TYPE: Creature SUBTYPE: Lizard Druid CMC: 4 Mana cost: USD: $5.79 EUR: 3.05 TIX: 0.02 EDHREC RANK: 9385 (4/4) Trample Whenever this creature attacks, another target creature you control gains trample and gets +X/+X until end of turn, where X is this creature's power
I mean, just consider the following
Some of the morphs like Vesuvan Shapeshifter, Willbender, and Nantuko Vigilante have value, but youd really want to move this into being a token and control deck so that your commander doesnt exile so much of your stuff