I will provide one metric: in last six months, the Lemur community shows 7 uploaded layouts. On MDP2, there are about 38. Quantity is not quality, but this shows more active users sharing MDP2 output.
MDP2 is an immediate, graphic environment. In Lemur, you will be reading manuals to learn things like Example: setexpression(Fader,'foo',3.14)
This might imply Lemur is more capable, but what it really means is a much greater learning curve to get something working. And on the Lemur wiki, details of many functions just show: "upcoming"
With MDP2, you also get an active community and developer, standing by to help with questions.