Tamron 35-150mm f/2.8-4 or Tamron 24-70mm f/2.8 G2?

For wedding photography. I currently have a 6D mark ii but looking to upgrade for dual card slots. I could get a 5d mark iii for $699 Canadian used, or an R6 for $2999 Canadian new.

35-150mm lens - 1199 24-70mm lens - 1460

Current lenses: canon 50mm 1.8, tamron 35mm, canon 24-105mm kit lens.