每镜两臂同输入（同 prompt/锚/音频窗/seed）仅引擎不同。逐镜点播 ▶ 对比，投完 12 镜 → 复制结果串发回群里。点播放时同镜另一路自动暂停。默认无声起播，点播放即出声。
机器预筛（端点 MAD 门: 首<8 / 末<20）— 终审以你的盲测为准
| 镜 | ★甲 | ★乙 | 基线 MAD 首/末 | VDN MAD 首/末 | VDN 耗时 | VDN 门 |
|---|
| s002_p1 | ★甲 = VDN 臂 | ★乙 = LXV 基线 | 3.0/19.4 | 3.5/13.1 | 15s | PASS |
| s003_p1 | ★甲 = VDN 臂 | ★乙 = LXV 基线 | 3.4/9.1 | 3.8/9.6 | 300s | PASS |
| s004_p1 | ★甲 = VDN 臂 | ★乙 = LXV 基线 | 5.1/46.8 | 6.1/47.0 | 820s | ENDPOINT_FAIL |
| s005_p1 | ★甲 = VDN 臂 | ★乙 = LXV 基线 | 3.1/11.3 | 3.6/11.7 | 627s | PASS |
| s006_p1 | ★甲 = LXV 基线 | ★乙 = VDN 臂 | 2.8/12.9 | 3.6/14.9 | 333s | PASS |
| s007_p1 | ★甲 = VDN 臂 | ★乙 = LXV 基线 | 3.8/16.0 | 4.7/17.5 | 333s | PASS |
| s008_p1 | ★甲 = LXV 基线 | ★乙 = VDN 臂 | 3.7/29.9 | 4.2/18.1 | 455s | PASS |
| s009_p1 | ★甲 = VDN 臂 | ★乙 = LXV 基线 | 4.1/19.0 | 4.7/19.6 | 225s | PASS |
| s010_p1 | ★甲 = VDN 臂 | ★乙 = LXV 基线 | 2.9/42.5 | 3.6/42.7 | 165s | ENDPOINT_FAIL |
| s010_p2 | ★甲 = LXV 基线 | ★乙 = VDN 臂 | 2.8/8.4 | 3.2/9.9 | 285s | PASS |
| s011_p1 | ★甲 = LXV 基线 | ★乙 = VDN 臂 | 4.0/22.3 | 4.2/23.5 | 271s | ENDPOINT_FAIL |
| s012_p1 | ★甲 = LXV 基线 | ★乙 = VDN 臂 | 3.5/13.3 | 4.2/13.8 | 226s | PASS |
协议: 同 prompt / 同 GT 网格真末锚(首+尾) / 同 lock_source 音频窗 / 同 seed 990202 / 同 1344×768 / 同 floor4 帧数; 唯一变量 = 引擎臂 (基线 LXV turbo 9步 euler/simple+SigmaShift6/3 vs VDN er_sde/beta 8步 ApplyVDNH3Advanced, 各自 canonical 配置)。