From what I can see, it does not come with a scene editor, and the community is not as big as Leadwerks.
That being said, from some of the screenshots, it looks pretty nice.
But it seems more like a library then a game engine, Leadwerks is not a game engine like Unity, it is still more like a library, but it includes stuff like a level editor, model viewer, material editor...
You can get both engines as a trial, so download them and spend a couple days with each engine. I have found many engines that look great feature-wise, but when you use it you think "i can't make a game with this, the tools are ****."
Benton