I like this idea! So it would look like this :
Difference amount:
0 - 0%
1 - 0%
2 - 10%
3 - 25%
4 - 45%

Also I'm not sure if this is the case, but does higher speed offset abilities like flying and dodge?
I'm also going to reiterate an idea I made in an earlier post. Monsters with the same speed should all get their attack in before dying. No more of this RNG who-goes-first bullshit. That would also let the devs put in a "first strike" ability, like in Magic the Gathering.

Posted using Splintertalk