Technically, they're both creatine. They should have close to the same effects.
I used mono a long time ago and thought it was great.
I'm currently using CEE and loving it. When i used mono, i looked like i was in the middle of a test cycle-bloated as hell.
This has no bloat and gives great pumps. I haven't gained much weight, but I'm dieting at the moment and not really losing any weight either. My strength goes up every workout, so i'm happy. No water retention and great pumps. I think it's working. I like it and recommend it.
I'm gaining strength, but maybe people gain more strength with mono due to the (water) weight that you put on and the extra leverage you gain from being heavier. I don't know.
I think it's a solid supp for in between cycles and it's not really that expensive at all.