Left Vertical Tag The Line:

Mirror Single Wheel; Left-shoulder Double Pass Thru.

Vertical Left Tag The Line:

Normal Single Wheel; Left-shoulder Double Pass Thru.

Personally, I never call Vertical Left Tag The Line; and I only use Left Vertical Tag The Line at C3B and above.

I think the usage of either one is at C1 is gimicky.

Ceder Chest Definition of Vertical Tag (The Line)