I often have discussions with people who still view Blu Ray as just a "more expensive DVD" which is what prompted this post.
VS DVD
Blu Rays usually display at 1080p compared to DVD's 576i. This is in the range of 5x the resolution bump
Blu Ray discs have a scratch-resistant coating meaning you're far less likely to suffer corrosion or scratches from repeated use like your old DVD collection
Blu Ray discs can store up to 50GB of Data compared to a maximum of 8.5GB for DVDs. 4k Blu Rays can store up to 100GB.
Australia uses region B Blu Rays which means we share a region, and can therefore play any discs from the UK. Some Blu Rays are entirely region free, though this is not the norm with the exception of…
All 4k Blu Rays are region free
VS Streaming
- Blu Ray discs have a higher encoded bitrate for playback. This means less compression and 'banding' artifacts. The general bit rate for a Blu Ray disc is approx. 40mb/s. 4k Blu ray is 128mb/s. Streaming has different rates, but generally hovers around ~7-10 mb/s. A significant reduction compared to disc.
Streaming uses a more efficient codec or whatever, so bitrate isn't a fair comparison. But you're right, 4k blu ray is better quality and especially noticeable with things like banding.