I have both. I think beige with gold is amazing. My black is a staple. Love both but I would get beige then black.
Chanel has so many beiges, I think you can find one you love even if it means preowned which is my preference.
I vote black but the beige is also quite tempting so I understand your dilemma. The black is more uniform whereas the beige can have a shade of yellow in the cf in recent years so it’s harder to outfit I think. Not to mention the color transfer, which makes it further limiting. Likely to get more cost per wear for black than beige, I think of the beige as more of a “nice to have” whereas black is more staple. I do plan to add the beige to my black at some point.