The Patriot Viper Venom 64GB DDR5-6000 wins in 3 out of 5 comparable specs. Its biggest advantage is Capacity (33% better).
Vengeance RGB 48GB DDR5-8000 wins in 2 specs (Speed: 33% better).
Recommendation
Choose Viper Venom 64GB DDR5-6000 if you want the best overall performance — especially capacity.
Choose Vengeance RGB 48GB DDR5-8000 if speed matters more to you.
