Recently I bought mylifeorganized, very similar to MM and could import/export vice versa.

originally they look very much like and overlap.

MM could be more powerful as MM have gantt charts but MLO dont have.

however MLO is tuned more towards task/project management -- MM could also do these but just several steps more or need DIY

in MLO the data are also "tree like" and could be exported and then imported to MM,

and MM could also be exported and imported into MLO.

of cause there will be some very specific data loss.

another good point for MLO is that it have cloud sync service (1USD/month) and

you can sync thru all your devices and EDIT -- which MM still dont allow us to do.

somehow, somehow they could be used to work together if necessary