Planning to buy RAM Cards.

Hello, I am planning to buy ram cards. I currently have 2x8GB DDR4-3200MHZ RAM sticks on my PC. I want to get 32GB as an upgrade for my PC.

My options are:

1. Buy additional 2x8GB DDR4-3200MHZ RAM sticks with same brand.

2. Buy 2x16GB DDR4 RAM sticks. (Still choosing options, open for suggestions).

Which of the two options are better, performance and cost wise?

Specs:

Motherboards: B550 AORUS ELITE

Current RAM: G Skill Ripjaws 3200 MHZ (2x8GB)

Thanks.