Jimmy Westenberg/Android Authority The latest Xiaomi Mi Band is officially on shelves regionally, with a global rollout coming soon. Based on the specs and design of the latest model, there’s a lot to look forward to. But what about that trusty older brother on your wrist? To find out if it’s high time for an upgrade, we compare the Xiaomi Mi Band 8 to the Mi Band 6 and take a look at the value of each device. Mi Band 8 vs. Mi Band 6 Design Mi Band 8Mi Band 6 An affordable fitness tracker will never go out of fashion, but that hasn’t stopped Xiaomi from adding some massive…