I know about Dameon's. I posted this knowing full well he has a contest similar to this one. But here's why: After hearing the discontent of some people at Dameon's choice of parametres by which they had to follow, I decided to give him a run for his money.
The notable differences between his and mine are as follows: 1) Mine is more open ended, and allows for characters not yet redesigned for RMO. 2) I only require one style, his requires you sprite in both the RMC and RMX styles. 3) I'm only giving you seven days, he's allowing a whole half month.
So there you go, while his and mine are similar, they are fundamentally different.