The migration from Bitcoin to Litecoin is testable precisely because trial can be told apart from noise. If a fee regime is mostly narrative, substitutes spike during the squeeze and mean-revert afterward. If settlement demand is real, the post-regime baseline resets higher and holds — trial converting to retention, a habit rather than a spike. Against the control set, the signal is persistence: the one chain whose floor keeps stepping up after each Bitcoin congestion window. On this surface that is an ordering claim shown as structure, not a measured result — no admissible Litecoin response has yet been recorded.