Advice GPU vs RAM. For premiere users

Hi !

I am looking into updating my computer (Mac) and I would like to make a good investment so that it would also allow me to edit smoothly. I thought you would be the right person to ask for advice, so I am wondering if you could help me understand wether I should choose to have better RAM or better GPU.

The question is what would you choose between this 2 setups:

OPTION A: iMac 21,5 inch - retina 4k

- 3,6‑GHz quad‑core Intel Core i7-processor van de 7e generatie, Turbo Boost tot 4,2 GHz

• - 32 GB 2400‑MHz DDR4
  - SSD van 512 GB
  - Radeon Pro 560 met 4 GB videogeheugen

OPTION B: iMac 27 inch - retina 5k

• - 4,2‑GHz quad‑core Intel Core i7-processor van de 7e generatie, Turbo Boost tot 4,5 GHz
  - 16 GB 2400‑MHz DDR
  - SSD van 512 GB
  - Radeon Pro 580 met 8 GB geheugen

Any advice would be lovely.

Thanks a lot in advanced!!

Merry christmas!!!

[Moderator's note: moved to best forum.]