The Blu-Ray version offers high-definition picture and surround sound.
Ensure the pack you buy is compatible with your player. Many Blu-Rays are "Region Free," but DVDs are often locked to specific regions (e.g., Region 2 for the UK/Europe). Peaky Blinders Series 6 Complete Pack
Which are you in? (This affects region coding and availability.) Peaky Blinders Series 6 Complete Pack