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README.md

@@ -40,9 +40,13 @@ correctly — phone numbers, emails, addresses, prices, dates, temperatures, %,
 | Held-out CER | **0.059** (zh/mix/en, 3-voice avg) | 0.11–0.15 (zh) |
 | Best on | Jetson Nano **GPU** (also any CPU) | pure **CPU** — Nano **RTF 0.35** (8 kHz, 1 thread) |
 
-Pick **v2.1** for the best quality and multiple voices; pick **v1** when the budget is CPU-only and tight.
-(`v2_mbistft_16k/` is v2.1's single-voice "Xinran" predecessor — same architecture, one speaker; kept for
-reference. `v3_4.6M/` and the top-level `*.onnx` are legacy 24 kHz variants.)
+Pick **v2.1** for multiple voices; pick **v1** when the budget is CPU-only and tight.
+
+> **Also: `v2_mbistft_16k/` — PrimeTTS v2, the peak-fidelity single Xinran voice.** Same architecture as v2.1
+> (one speaker) but trained on the *full* clean 29k Xinran corpus, so its Xinran is the most intelligible in
+> the family — **CER 0.027** vs v2.1's 0.059 — at the **same** on-device RTF (0.52 @4thr). Use v2 when you only
+> need Xinran and want the cleanest possible output; use v2.1 when you want a choice of voice.
+> (`v3_4.6M/` and the top-level `*.onnx` are legacy 24 kHz variants, kept for provenance.)
 
 > 🔊 **Live demo:** https://huggingface.co/spaces/Luigi/PrimeTTS-vs-Inflect-Nano-v1 — pick a model, pick a voice, type text.