Differentiate tier2 kind-8 recipe shape peers

artifacts/exports/rt3-1.06/runtime-effect-kind8-tier2-recipe-signature-note.md

@@ -90,3 +90,33 @@ So the next concrete comparison question is:
 - whether the two mode-shape peers `Britain.gmp` and `South East USA.gmp` diverge from
   `Louisiana.gmp` strongly enough on token lanes and later Tier 2/runtime-facing state to explain
   why only `Louisiana.gmp` currently lines up with the shipped `Add Building Warehouse05` path
+
+## Mode-shape peer split
+
+Direct fixed-layout comparison of the two `book00.line02` mode-shape peers now answers that first
+half positively.
+
+`Louisiana.gmp` keeps:
+
+- `book00.line00`: demanded token `0x00010000`
+- `book00.line01`: demanded token `0x6c430000`
+- `book00.line02`: mode `0x00080000`, supplied token `0x00004080`
+
+`Britain.gmp` diverges strongly:
+
+- `book00.line01`: supplied token `0x00210000`, demanded token `0x72490000`
+- `book00.line02`: mode `0x00120000`, supplied token `0x00003f80`
+- extra zero-mode supplied rows at `book01.line01` and `book02.line01`
+
+`South East USA.gmp` stays structurally closer but still diverges on the exact imported values:
+
+- `book00.line00`: demanded token `0x00010000` matches
+- `book00.line01`: demanded token `0x6c410000` differs from `Louisiana`'s `0x6c430000`
+- `book00.line02`: mode `0x00010000` and supplied token `0x00004000` both differ from
+  `Louisiana`'s `0x00080000 / 0x00004080`
+- extra zero-mode supplied row at `book01.line01`
+
+So the current corpus split is:
+
+- `book00.line02`-only mode shape is a three-map family
+- but `Louisiana.gmp` still has a distinct exact token-bearing signature even inside that family