UDK vs Shiva3D vs Unity3d

I am still searching for a good comparison of these game engines and i can't seem to find any... What i did find is that:

UDK has the best graphics,

Shiva3D has most platforms to publish games on and

Unity3d should be the just all around good and not really best at anything...
well for now im sticking with the Unity3D mostly because i already started the project there and it will be a great pain to redo all the stuff i made and i do kinda know to use Unity3D compared to the other two.