Decay... seems ominous but maybe not stagnant. It feels vibrant still. An encapsulated hope somewhere in the void, sounds tubular and large, very atmospheric... I love the build.
With Rebirth you definitely have more momentum and energy. Reminds me of the soundtracks you might hear play in documentaries of the universe; in those scenes were one cell organisms turn to two cell ones, and plants start growing, and the greenery expands and everything gets bright and beautiful and utopian... really cool build here too, and then towards the end, it slows down, like it's reached a peak; like it nears the point of decay once again...
Hopefully there's plenty of middle ground between those points though.
Composition's great; production's great... it's a real audial journey from start to finish.
Nicely done.
-cd-