Alpha, you're right.
RVR/CMV and VIS are not the same thing indeed.
At night we could have 600 m of visibility, which would be equal to RVR/CMV 1200 m provided HIALS and HIRL are operative and RVR is not reported. (EU-OPS again)
But with either RVR 1200 m or VIS 600m we won't be able to see approach lights that are 1376 m away.
We don't calculate minimum RVRs either, as they are standard for given DA(H), but it seems that for 3° profiles and DH > 350 ft that standard minimums could lead to weird results.