I didn't bone-meal meh trees, I built it legit, and a lot of maps have a tree, grass and a cave...That's the thing, even if there are differences, it's hard to tell. We don't mean the height of the island is the same or the shape of the islands. The islands are very general and look very similar to the others. Bone-mealed trees, grass, and a cave.
Try starting with a theme & build off that. Also, don't forget to add ores :)