Whats the difference between those two plugins?

Well, I was looking for a achievements plugin for mybbI came across the following two plugins.

- Myachievements
- Achievements

I saw Myachievements was posted here on nulled to and Achievements is a free plugin but so far i saw it was compatible with 1.6 only even after changing the compatibility to 1.8.

So i was basically wondering which plugin would be best choice? Since i never used a plugin similar to these two before