I recently found a Gillette red tip and after shaving with it, there is no comparison to the Rex Envoy. The Red tip is not aggressive when compared to the Envoy. Both are great razors in their own way.
I have both the Envoy and the GameChanger 0.84 and I think that the GC 0.84 is more aggressive and has more blade feel than the Envoy does. That is just my personal observation based on my use of both razors.